The nail presser lid structure for a nailer includes a coupling end and a swinging end. The swinging end is provided with a flexible presser, formed of a presser portion and a spring. The presser portion protrudes from the swinging end to press on the closing side of the removable cover. An inclined guide plane is placed outside of the presser portion. When the removable cover presses the inclined guide plane, the presser portion is forced to return and press the spring to accumulate elastic restoring force. When the closing side of the removable cover overpasses the inclined guide plane, the presser portion will recover again and press the positioning portion of the closing side, such that the nail presser lid and removable cover of the nail box are closed flexibly, offering greater operational friendliness and practicability.