To provide an attachment structure of a sliding member which can be easily attached.

A pressing button 10 is attached to a case 12 by fitting in a coil spring 14 into a spring shaft 18, and then fitting in a button main body 16 into a hole 24, and locking a tip of the coil spring 14 to a spring washer 26. The spring shaft 18 has a claw part 22 provided at its tip, by which 22, the coil spring 14 fitted into the spring shaft 18 is temporarily fixed to the spring shaft 18. Therefore, there is no fear of the coil spring 18 coming off from the spring shaft 18 during the attachment work, and the pressing button 10 can be easily attached to the case.