An assembly set includes a base member that has a pair of cylindrical parts and a connection part, a connector member, and a rod member. Each of the cylindrical parts has a first columnar protrusion protruding from one end and a first cylindrical boss portion positioned within the cylindrical part. The first protrusion of another base member is fitted between an inner peripheral surface of the cylindrical part and the first boss portion. The rod member has a pair of coupling parts fitted into the connector member and a rod part connecting the pair of coupling parts. The connector member has a second columnar protrusion fitted into the first boss portion and a pair of second cylindrical boss portions into which the coupling parts are fitted to swingably hold the rod member.