A robot according to an aspect of the invention includes an enclosure having an opening formed therein, a lid section that is provided on the enclosure in a detachable manner and blocks at least part of the opening, an attachment and detachment section which is provided on the lid section on the side facing the opening of the enclosure and to and from which a replaceable part is attached and detached, and a holding mechanism that allows the enclosure to hold the lid section when the lid section is detached from the enclosure.