A storage device includes, in a box having an open front, a rotation mechanism section that rotatably holds a storage body that stores an object and is rotatable about a shaft extending along an up-down direction. The rotation mechanism section includes: a stationary rail affixed to a top surface of the box and including a guide groove open downward and forward and extending in a front-back direction and a guide body on a holding section protruding downward from a groove bottom surface of the guide groove; and a movable rail movable in the front-back direction along the guide groove in the stationary rail, coupled to the storage body via the shaft, and including: left and right sidewalls, a bottom wall, and a front end wall that define a receiving groove for receiving the guide body; and a top wall that forms a slit opening for receiving the holding section.