Shrimp peeling machine (1) including a closed chain (3) including cylindrical rolls (4,5,6), (7) and includes first rolls (4), second rolls (5) and third rolls (6) and where at least the first (4) and second (5) rolls in a limited area—the peeling area (8)—are designed to turn by an activation element (9). The shrimp peeling machine (1) includes a first motor device (10), which drives the activation element (9) and another motor device (11), which drives the chain (3) forwards in the shrimp peeling process direction (7). The activation element (9) includes at least one toothed belt (12) with a first action surface (13) and another action surface (14). The first action surface (13) is with first items (15) in mesh with the first roll (4) and the second action surface (14) is with second items (16) in mesh with the second roll (5).