Housing and keyboard instrument

The invention provides a housing and a keyboard instrument. The housing includes: an exterior member including a first surface including an outer surface of a first sheet and a second surface connected to the first surface; and an attachment member to which the exterior member is attached, the attachment member having an opposing surface disposed so as to face the second surface, and a protruding end of the opposing surface protruding from the first surface in a cross-sectional view. 本发明提供一种壳体以及键盘乐器。壳体具备：外装部件，其具备包括第一片材的外表面的第一面和与所述第一面连接的第二面；以及安装部件，其安装有所述外装部件，具有与所述第二面对置配置的对置面，剖视时的所述对置面的突端比所述第一面突出。