A morphological deforming toy allowing the deformation of a doll robot toy in a compact shape, wherein the pair of leg parts (11) of the doll robot toy (1) comprise knee position connection mechanisms(23) connecting thigh parts (11a) to leg parts (11b) and ankle position connection mechanisms (27) connecting the leg parts (11b) to foot parts (11c). Each of the knee position connection mechanisms(23) is formed so that the calf section of the leg part (11b) can be positioned adjacent to the rear side of the thigh part (11a). Each of the ankle position connection mechanisms (27) is formed so that the rear of the foot part (11c) can be positioned adjacent to the rear surface of the body part (5) of the doll robot toy.