The utility model relates to a hammer, in particular to a whole forging straight claw hammer with an enlarged striking area. Restricted in the size of a striking area, an existing hammer is not enough in striking accuracy, and a user can finish accurate striking only when concentrating. Not concentrative enough in the center of gravity, the existing hammer is not labor saving at striking time, and the user is prone to operation fatigue during operating processes. To improve the utilization efficiency of the existing hammer, the whole forging straight claw hammer has the advantages of being high in striking accuracy, concentrative in striking force, efficient, and long in service life compare with a traditional hammer of the same specification due to the fact that the striking area is enlarged, the structure is optimized, and the center of gravity is enabled to be maintained on the head of the hammer.