Connection member, manufacturing method of connection member, and robot

摘要

A connection member (4) includes: a main member (4A) formed by bending a plate made of a first material having a certain strength into a predetermined shape, and having a hole (401, 402) to which an object to be connected is mounted; and an auxiliary member (4B) formed of a second material having a smaller specific gravity than the first material and formed thicker than the main member, jointed around the hole of the main member, and having an insertion hole (500) through which a fastening member for fastening the object to be connected is inserted.