To provide a children's floating aid which not only eliminates fear of water from a child because the face is not dipped in water even if the child holds the body horizontal, but also the child can joyfully practice the thrash at ease because the floating aid has a dent part to accept the chest part when the child lies on his/her belly and the body of the child is prevented from shifting to right or left by a series of projected trunk holding parts set in both sides thereof to give the child feeling being held in parent's arms.

This floating aid has the outside made of a soft material such as rubber and the inside into which air is sent. The floating aid comprises a float main body long in the advancing direction on which the child can lay the upper half body lying on his/her body. The float main body is equipped with a projection part on which the jaw of the child can be lied lying on his/her body, right and left grips to be gripped by both hands, a dent part to accept the chest part of the child, and trunk holding parts in right and left sides of the dent part to prevent the body of the child from shifting. Further, on the bottom face of the float main body, a plurality of parallel projection parts with wave shape cross sections along the advancing direction.