To provide a connecting frame between partition panels for a building capable of being used for reinforcing the partition panels and connecting structure between the partition panels for the building using the connecting frame.

Along-sized article has a pair of recessed sections 2, 3, into which the end sections of the partition panels 21, 22 are fitted respectively, at both ends of an intermediate section 4. Each recessed section 2, 3 consists of the wide recessed sections 2 and the narrow recessed sections 3, and corresponds to panels having different plate thickness. Each recessed-section plane 2a, 3a on the reverse sides to the panel end-section fitting sides in each recessed section 2, 3 of one connecting frame 1a can be abutted against each recessed-section plane 2a, 3a of the other connecting frame 1b. The end sections of the panels 21, 22 are fitted to one recessed sections 2, 2 in each of a pair of the connecting frames 1a, 1b. Since a pair of the connecting frames 1a, 1b are abutted beforehand in the mutual recessed-section planes 2a, 3a, both connecting frames 1a, 1b are difficult to be inclined even when pushing force works to the panels 21, 22, and the panels 21, 22 can be reinforced firmly.