Frame casing for assemling type exercising articles

The utility model provides a modular crib for fitness equipment. The crib takes a cuboid shape with a longer longitudinal length, and can be placed on the ground or fixed on a wall, and has a containing chamber that recesses backward from the facade. A hinging rabbet is respectively arranged at a section close to the bottom end on the left and right flank walls of the containing chamber. The crib can be used to erect the scheduled position of a fitness apparatus at the hinging rabbet, making the fitness apparatus pivot between a using position and a collecting position. When located at the using position, the crib can be placed on the ground steadily for people to use. When located at the collecting position, the crib can be contained in the containing chamber of the crib and positioned steadily.