FOLDABLE TOTE BOX

There is provided a foldable tote box that enables a content thereof to be visually checked under a state in which a lid is closed. A foldable tote box of the present invention includes a box body. The box body includes: a square or rectangular bottom surface part; front and rear side wall parts and right and left side wall parts corresponding to respective sides of the bottom surface part; a lid extending from an upper edge of the rear side wall part; and a reinforcement plate configured to reinforce the bottom surface part. The reinforcement plate is pivotably mounted on a lower edge of the front side wall part or the rear side wall part. The right and left side wall parts are inwardly foldable when a center portion of the bottom surface part is pulled up. Each of the side wall parts is formed of a frame member configured to define an outline of the side wall part and maintain a shape of the side wall part, and a sheet material supported by the frame member. The sheet material includes a transparent portion, and the transparent portion enables a content of the foldable tote box to be visually checked.