The author of the presented article introduces the problems of protection of the child in armed conflict. In modern international law there still remain many unsolved problems concerning legal aspects of the status of the child in armed conflict.Although the regulation of the aspect is quite thorough, one of the most crucial matters, like the minimum age for a child to be admitted to the armed forces is not solved definitively. The same regards the age frames for a person to be held for a child on the basis of international law.The author also highlights the complexity of the problem. Children-aspect in the armed conflict implies the division of children as a complex group into several categories, like child-soldiers, unaccompanied children, refugeechildren, imprisoned-children, and many others. All of these groups demand special approach and consideration.