A projector control device (200) that controls at least three projectors (100a-100d) that each project a video signal to different projection areas (30a-30d). The projector control device (200) comprises an arrangement changing unit (230) that changes the arrangement of the at least three projection areas (30a-30d) from a first arrangement to a second arrangement that differs from the first arrangement, by causing at least one of the at least three projection areas (30a-30d) corresponding to the at least three projectors (100a-100d) to move at prescribed movement intervals. The arrangement changing unit (230) changes from the first arrangement to the second arrangement by moving at least one of the projection areas among the at least three projection areas (30a-30d), in a state in which the relative position is maintained between two projection areas (30b and 30c) that partially overlap among the at least three projection areas (30a-30d).
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