Abstract: A switch unit according to the present invention includes: a plurality of switches; a panel on which the plurality of switches are arranged side by side along one direction; and an attachment assembled to the panel in a state that at least one of the switches is assembled thereto. The panel is formed in a manner that a surface thereof bends along a parallel direction, which is a direction that the plurality of switches line up. The attachment has wall surface parts assembled to the switch so as to surround the switch. A side face part along the parallel direction of the panel has an engagement part. Among the wall surface parts of the attachment, a side wall surface part facing the side face part in a state that the attachment is assembled to the panel has an engaged part with which the engagement part is engaged.