To improve the yield of a product of a corrugated plate with its corrugation pitch regulated by eliminating the collapse of the corrugation in setting the corrugation pitch of the corrugated plate to the specified value by a pitch regulation roller.

In a corrugation pitch regulation device, a second pitch regulation roller 16 having an uneven circumferential surface 16a of the specified pitch is arranged on the downstream side of a first pitch regulation roller 15 to be engaged with the corrugated plate 4 in the feeding direction X of a corrugated plate 4. The first pitch regulation roller 15 is rotated at the first circumferential speed V1. The second pitch regulation roller 16 is engaged with the corrugated plate 4, and rotated at the second circumferential speed V2. The corrugation pitch of the corrugated plate 4 is roughly regulated to the specified value between the first and second pitch regulation rollers 15, 16 due to the differential speed between the first and second circumferential speeds V1, V2, and the corrugation pitch of the corrugated plate 4 is permanently regulated to the specified value by the second pitch regulation roller 16.