To provide a screw pressor capable of coping with length and size of a cross slot screwdriver bit, allowing a screw head to be seen, not falling even in idling, and automatically removed in driving.

This screw presser can extend its arm even to the long cross slot screwdriver bit and presses a screw by utilizing a spring. A screw head pressing portion is bent into the ?-shape, and is wider than the screw in some degree. The spring is placed on the ?-shaped outer frame. The screw presser is automatically removed when the screw is driven.