To reduce the cost and the assembly man-hours by minimizing the number of components while ensuring the attachable/detachable function and operability of first and second devices.

This link type hinge comprises a lower piece 20 provided with a hinge unit 17 and hole parts 20a, 20b to pass a pair of shaft bodies, a shaft parts 18 to urge one of the shaft bodies to be passed through the hole parts 20a, 20b movably in the axial direction after the assembly, and an upper piece 19 which supports the shaft parts passed through the hole part movably in the axial direction and fixes the other of a pair of the shaft bodies in a non- movable condition after the assembly.