To provide a clamp capable of simultaneously fixing the positional relation between at least workpieces adjacent to each other in handling a plurality of workpieces simultaneously.

This clamp includes a mechanism to push down a turning type operation arm 4 pivotally mounted on this base 2 by turning the operation lever 3 pivotally mounted on the base 2. In this case, a pressing arm 1, which is bent in one way from the direction in which the turning type operation arm 4 extends, is pivotally mounted on the turning type operation arm 4 and is provided with a first pressing protrusion 5, which is protruded in the direction in which the turning type operation arm 4 extends, and a second pressing protrusion 6, which is protruded approximately in the direction in which the pressing arm 1 is turned.