A toner container adapted to be detachably attached to a developer provided in an apparatus body of an image forming apparatus includes a casing for loading a toner therein. The casing has a bottom wall formed with a replenishing port for replenishing the toner to the developer. A sheet member is placed on the bottom wall. The sheet member has a first end fixed to the casing near the replenishing port, and a second end opposite to the first end. The second end is movable up and down. A first magnet is attached to a lead end of the second end of the sheet member, and a guide to guide the up and down movement of the first magnet. The first magnet is upwardly movable while being guided by the guide by a repulsion force resulting from application of a certain magnetic force to the first magnet.