This case involves the intractable issue of child-custody.
Appellant and her former husband were divorced in 1969. The divorce judgment awarded custody of their minor child to the child’s paternal grandparents and provided for visitation rights for the appellant. In 1973 the appellant brought this action in the nature of habeas corpus in the Superior Court of Bibb County seeking custody of her child. Her complaint alleged that changed conditions and circumstances since the original judgment *499warranted the change of custody.
The trial judge transferred the case to the juvenile court pursuant to Code Ann. § 24A-301 (c) which provides: "Where custody is the subject of controversy, except in those cases where the law now gives the superior courts exclusive jurisdiction . . . the juvenile court shall have concurrent jurisdiction to hear and determine the issue of custody and support when the issue is transferred by proper order of the superior court.”
The appellees filed their motion for summary judgment which essentially contended that there had been no changed conditions or circumstances affecting the welfare of the child since the original custody judgment, that there was no factual issue for determination, and that they were entitled to a judgment in their favor as a matter of law. The juvenile court judge granted summary judgment for the appellees, and appellant has come directly from the juvenile court to this court seeking review.
I.
This case is an action in the nature of habeas corpus. Therefore, it was properly transferred by order of the superior court to the juvenile court pursuant to Code Ann. § 24A-301 (c). The superior courts have exclusive jurisdiction in cases of divorce (Code Ann. § 2-3901), and when a child custody controversy is decided in a divorce case pursuant to Code Ann. § 30-127, the question of custody can not be transferred to a juvenile court. However, the superior courts do not have exclusive jurisdiction in habeas corpus actions or actions in the nature of habeas corpus. See Code § 50-103 and Fortson v. Fortson, 200 Ga. 116 (35 SE2d 896) (1945). We find that there was no legal prohibition to the transfer of this case by order of the superior court to the juvenile court.
II.
We now come to the question of res judicata in child custody cases. It is clear that a prior final judgment had awarded custody of the child in this case to the appellees, the paternal grandparents, with visitation rights accorded to the appellant, the natural mother of the child.
Code § 50-121 provides: "In all writs of habeas corpus *500sued out on account of the detention of a . . . child, the court, on hearing all the facts, may exercise his discretion as to whom the custody of such . . . child shall be given, and shall have power to give such custody of a child to a third person.” This statute has been interpreted by this court to mean that even in the face of a former judgment awarding custody that has become final, a habeas corpus court is authorized to change the custody of a child if changed conditions affecting the welfare of the child have come about since the rendition of the former judgment. In Williams v. Crosby, 118 Ga. 296 (45 SE 282) (1903), this court said: "The [divorce] decree is a final adjudication as to the status of the parties to the divorce proceedings, but the jurisdiction of a habeas corpus court over the custody of the child is continuing. In the nature of things this must be so. The capacity, ability, or fitness of the party to whom the child was awarded in the divorce proceedings may thereafter become entirely different. The care and protection which the law affords the child is not limited to the date of the decree. Under the Civil Code, §§ 2452-3, the court has jurisdiction at any time to award the custody of the child as its best interests may demand.” Thus it is seen that the principle of res judicata is quite different in child custody cases from its application in other cases.
The real crux of the problem is this: What are "changed conditions affecting the welfare of a child” that will warrant a change in custody different from that awarded by a former final judgment?
After reviewing many cases decided by this court on this subject, and in an attempt to establish some semblance of order in this area of the law, we have concluded that a rule must be set forth that the habeas corpus courts can hopefully follow.
Changed conditions affecting the welfare of a child occurring after the rendition of a former final custody judgment which will warrant the issuance of a new judgment by a habeas corpus court effecting a change of custody or visitation rights is essentially a fact issue in each individual case which must be decided by the habeas corpus court. And if there is "reasonable evidence” in the record to support the decision made by the habeas corpus *501court in changing custody or visitation rights, then the decision of the habeas corpus court must prevail as a final judgment, and it will be affirmed on appeal.
III.
Appellant has specifically requested this court to review and overrule the case of Young v. Pearce, 212 Ga. 722 (95 SE2d 671) (1956), the implication of this request being that Young v. Pearce is being interpreted to mean that "changed conditions” in the status of a natural parent, alone and without other and additional changed circumstances, is always insufficient as a matter of law to warrant a new judgment changing custody or visitation rights. While the judgment of the juvenile court in this case awarding summary judgment in favor of the appellees as a matter of law does not state the reason or basis for its rendition, the appellant in her brief infers that judgment as a matter of law was rendered for the appellees because of this interpretation of Young v. Pearce, supra.
This court’s holding in Young v. Pearce was as follows: "The undisputed evidence in this case shows that the grandmother is a fit and proper person to have custody of the child, and that the child is being well provided for, is being sent to school and to church, and is being reared under excellent physical and moral conditions. The evidence offered by the mother was to the effect that she is in better condition to take care of the child now than when custody was originally awarded, and that she and her husband are financially and otherwise capable of taking care of the child. These facts do not show a change in conditions and circumstances materially affecting the interest and welfare of the child, and there was no error in denying the prayers of the petition.” Id., Hn. 4.
Young v. Pearce should not be read as meaning that the evidence submitted in that case precluded consideration of the out-of-custody parent’s "changed conditions” as a matter of law. While we decline to overrule Young v. Pearce, we emphasize that any consideration of custody must always be made in the light of the best interests of the child involved. Therefore, where the out-of-custody parent’s conditions have *502changed to the extent that the best interests of the child would be materially affected, then evidence should be admitted to show the effect of the change on the child even though no change of condition of the custodian has been shown.
In Handley v. Handley, 204 Ga. 57, 59 (48 SE2d 827) (1948), this court said: "A change of circumstances that would render a prior judgment inconclusive is not necessarily limited to a change in the moral or financial condition of the parent to whom the initial award was made, but includes any new and material change in the circumstances of either parent or of the children which might substantially affect the health, happiness, or welfare of the children.” (Emphasis supplied.) We consider the rule stated in Handley to be merely expansive of the rule stated in Young v. Pearce. Young should be read to hold that a showing of changed conditions of an out-of-custody parent, without a showing of its material effect on the child, is insufficient to warrant a change in custody.
IV.
The evidence in this case showed changed conditions with respect to the age of the child since the rendition of the former judgment; it showed changed conditions with respect to the age of the grandparents and their relationship toward the child since the rendition of the former judgment; it showed changed conditions with respect to the financial status, the marital status, and the maturity status of the appellant since the rendition of the former judgment; and it showed changed conditions with respect to the attitude of the child toward her paternal grandparents and her natural mother since the rendition of the former judgment. All of these evidentiary circumstances created a question of fact for determination by the trial judge, and it was error for him to render a summary judgment in this case. It was incumbent upon the trial judge in this case to hear evidence with respect to changed conditions and render a decision based upon his discretion and good judgment as he viewed the evidence, giving primary consideration to the welfare of the child. In any event, it was erroneous for him to grant a motion for summary judgment in favor *503of the appellees.
Argued March 11, 1974 Decided July 9, 1974. Byrd, Groover & Buford, Denmark Groover, Jr., for appellant. Harris, Watkins, Taylor & Davis, T. Reese Watkins, Adams, O’Neal, Hemingway & Kaplan, H. T. O’Neal, Jr., Kice H. Stone, for appellees.Judgment reversed.
All the Justices concur, except Grice, C. J, who concurs specially.