To provide the structure of a baby carry cot usable in a hand bag form at the time of going out and usable in a baby carry basket form and a mat full-open form in the case of being used for a baby.

The structure of a carry box 2 is not turned to a fixed type nor a basket type woven with the stalk of corn and one mat bedding for which a mat structure is turned to a main body, cotton made strong by infiltrating resin is filled inside and quilting or the like is performed to a cloth on a surface is formed into a three-dimensional box-shaped carry box 2 by bending four corners and zipping them with zippers 6 or the like. At the time of carrying the baby, it is constituted as the carry box 2. At the time of laying down the baby outdoors, the zippers 6 are detached and it is spread to the state of mats 3a-3e and used. Also, at the time of going out, it is turned to a hand bag 1 styled with high quality. Anyone can easily change it for various uses.