Abstract: To make it possible to simply and easily attach/detach an attaching target to/from an attached target. A coupler includes: a base to be fixed to an attached target; and an attachment body that is fixed to the attaching target and to be detachably joined to the base, in which: the base includes a joint surface to be joined to the attachment body, a magnet configured to magnetically attach the attachment body to the joint surface, and an engaging part configured to engage with the attachment body; and the attachment body includes a joint surface to be joined to the base, a magnet configured to magnetically attach the magnet of the base to the joint surface, and an engaged part configured to disengageably engage with the engaging part of the base and restrict separation from the base.

Abstract: To make it possible to simply and easily attach/detach an attaching target to/from an attached target. A coupler includes: a base to be fixed to an attached target; and an attachment body that is fixed to the attaching target and to be detachably joined to the base, in which: the base includes a joint surface to be joined to the attachment body, a magnet configured to magnetically attach the attachment body to the joint surface, and an engaging part configured to engage with the attachment body; and the attachment body includes a joint surface to be joined to the base, a magnet configured to magnetically attach the magnet of the base to the joint surface, and an engaged part configured to disengageably engage with the engaging part of the base and restrict separation from the base.