A pulling detection device comprising: a base in which, on a plate-shaped foundation portion extending in a longitudinal direction, a first wall portion, a projection opposed to the first wall portion, and a second wall portion opposed to the projection are provided in this order in the longitudinal direction; a movable rod including a switch operation body and a pulling rod, the switch operation body having a first wall portion opposed surface opposed to the first wall portion, a projection opposed surface opposed to a side of the projection opposed to the first wall portion, and a second wall portion opposed surface opposed to the second wall portion, the pulling rod extending from the second wall portion opposed surface so as to penetrate the second wall portion, the movable rod being movable along the foundation portion in the longitudinal direction of the foundation portion, while movement of the movable rod toward one side in the longitudinal direction is restricted by contact between the first wall portion and the first wall portion opposed surface and movement of the movable rod toward another side in the longitudinal direction is restricted by contact between the projection and the projection opposed surface; an elastic body provided between the second wall portion opposed surface and the second wall portion so as to press the second wall portion opposed surface, the elastic body being extendable/contractible in the longitudinal direction of the foundation portion; a first switch which operates by contact/separation between the first wall portion and the first wall portion opposed surface; and a second switch which operates by contact/separation between the projection and the projection opposed surface. a base in which, on a plate-shaped foundation portion extending in a longitudinal direction, a first wall portion, a projection opposed to the first wall portion, and a second wall portion opposed to the projection are provided in this order in the longitudinal direction; a movable rod including a switch operation body and a pulling rod, the switch operation body having a first wall portion opposed surface opposed to the first wall portion, a projection opposed surface opposed to a side of the projection opposed to the first wall portion, and a second wall portion opposed surface opposed to the second wall portion, the pulling rod extending from the second wall portion opposed surface so as to penetrate the second wall portion, the movable rod being movable along the foundation portion in the longitudinal direction of the foundation portion, while movement of the movable rod toward one side in the longitudinal direction is restricted by contact between the first wall portion and the first wall portion opposed surface and movement of the movable rod toward another side in the longitudinal direction is restricted by contact between the projection and the projection opposed surface; an elastic body provided between the second wall portion opposed surface and the second wall portion so as to press the second wall portion opposed surface, the elastic body being extendable/contractible in the longitudinal direction of the foundation portion; a first switch which operates by contact/separation between the first wall portion and the first wall portion opposed surface; and a second switch which operates by contact/separation between the projection and the projection opposed surface.