To provide a sheet cutter forming an inclined cut end face across the whole cut end face.

A cutter 12 is positioned above a rubber sheet S to cut the rubber sheet S along the direction orthogonal to the extending direction X of the rubber sheet S. A rear anvil 14 and a front anvil 16 are disposed under the rubber sheet S, whose part to be cut by the cutter 12 is held, and as the front anvil 16 rises, the longitudinal direction L of the rubber sheet S is inclined to the cutter 12. A sheet receiving member 24, the tip side of which is a slant is integrally installed on the front anvil 16 at the rising side, whereby when the front anvil 16 rises, the rubber sheet S is pressed from below by the tip side of the sheet receiving member 24. A rear clamp 18 and a front clamp 20 for pressing the rubber sheet S from above are disposed on the upside of the rubber sheet S whose part to be cut by the cutter 12 is held.