A toner case comprising: a case main body storing a toner; and an agitator rotating around a rotation axis extending along one direction and agitating the toner stored in the case main body, wherein the case main body includes: a cylindrical circumferential wall extending along the one direction; a side wall closing an end portion of the circumferential wall in the one direction; a curve curved in an arc shape around the rotation axis provided at the end portion of the circumferential wall in the one direction; a recess recessed from the curve toward a side remote from the rotation axis provided at the end portion of the circumferential wall in the one direction; and a replenishment port through which the toner is replenished to the case main body, the replenishment port being provided in the side wall so as to overlap with the recess when viewed in the one direction, and the agitator includes: a holding piece provided at an interval from the curve and rotating around the rotation axis; and a film held by the holding piece so as to protrude toward an inside of the case main body in the one direction, wherein in a state where the holding piece is in a first rotating position, the film comes into contact with an inner circumferential face of the curve so that the film is in a bent state, and in a state where the holding piece is in a second rotating position, the film is inserted into the recess. a case main body storing a toner; and an agitator rotating around a rotation axis extending along one direction and agitating the toner stored in the case main body, wherein the case main body includes: a cylindrical circumferential wall extending along the one direction; a side wall closing an end portion of the circumferential wall in the one direction; a curve curved in an arc shape around the rotation axis provided at the end portion of the circumferential wall in the one direction; a recess recessed from the curve toward a side remote from the rotation axis provided at the end portion of the circumferential wall in the one direction; and a replenishment port through which the toner is replenished to the case main body, the replenishment port being provided in the side wall so as to overlap with the recess when viewed in the one direction, and the agitator includes: a holding piece provided at an interval from the curve and rotating around the rotation axis; and a film held by the holding piece so as to protrude toward an inside of the case main body in the one direction, wherein in a state where the holding piece is in a first rotating position, the film comes into contact with an inner circumferential face of the curve so that the film is in a bent state, and in a state where the holding piece is in a second rotating position, the film is inserted into the recess. a holding piece provided at an interval from the curve and rotating around the rotation axis; and a film held by the holding piece so as to protrude toward an inside of the case main body in the one direction, wherein in a state where the holding piece is in a first rotating position, the film comes into contact with an inner circumferential face of the curve so that the film is in a bent state, and in a state where the holding piece is in a second rotating position, the film is inserted into the recess.