A device for protecting the fingers of a person from getting impinged in between the door and the doorframe during closing of the door by an operator is provided. The device includes a gripping body configured to wrap around the shank of the doorknob, a bumper body attached to the gripping body configured to prevent the closing of the door, a hollow unit positioned between the bumper body and the gripping body, and one or more connecting body to pass through the hollow unit to connect the gripping body with the shank of the doorknob. When the door is opened, the bumper body is positioned between the door and the door frame. In order to close the door, the operator rotates the doorknob normally, which moves the bumper body, away from the leading edge of the door. The process makes an operator cautious while closing the door and thus effectively protects fingers and hands of the person from injuries that may result from a slamming door.