PURPOSE: To provide joining structure for a counter capable of joining the counter by fastening it at an arbitrary position, and adjusting a step difference between joined parts of the counter.

CONSTITUTION: This structure is provided with a member which fixes side stretcher materials 1 to be set along with the back plane terminal part of respective counters 2 to be joined, and a groove 3 is formed in the longitudinal direction of the inside plane of the crosspiece material, and also, the member holds both side stretcher materials 1 inbetween while engaged with the groove 3.