A projector includes a shift unit configured to move a projection position of an image, a black adjustment unit configured to make luminance of black in a non-overlapping region, in which an image projected by the projector and an image projected by another projector do not overlap on the projection surface, higher than that in an overlapping region, in which the image projected by the projector and the image projected by the other projector overlap on the projection surface, in such a way as to uniform the luminance of black between the non-overlapping region and the overlapping region, and a control unit configured to move a boundary position in the image between a region where the luminance is adjusted by the black adjustment unit and a region where the luminance is not adjusted, by an amount where the projection position is moved by the shift unit.