To provide a component attaching device capable of solving a problem due to erroneous combination of a first member and a second member without using a receptacle tool, and to provide its manufacturing method.

The component attaching device includes the first member 2 having a plurality of identifying protrusions, the second member 3 having at least one engaging receptacle corresponding to the plurality of identifying protrusions, and a fastening member 5 for fastening the first and second members 2 and 3. The plurality of identifying protrusions are selectively removed depending on specifications, the first member 2 and the second member 3 are combined, and the first and second members 2 and 3 are fastened by the fastening member 5.