A razor head comprising: a housing having a front edge, a rear edge, side edges extended between the front edge and the rear edge, and through holes located between the front edge and the rear edge; at least one razor blade located between the front edge and the rear edge, and the razor blade being assembled on the side edges along a first direction and being limited to move along the first direction by the side edges, the first direction being a direction from up to bottom along the housing; and a clamping piece, the clamping piece having a pressing section across the razor blade and an insertion section bent from the pressing section and inserted into the through hole along the first direction, the razor head being characterized in that a separation notch is provided on the insertion section and extended through an end of the insertion section along the first direction to form an expansion portion which is expanded toward inner walls of the through hole, the pressing section is stretched by means of the expansion portion, the insertion section is prevented from being drawn from the through hole along an opposite direction of the first direction due to the expansion portion, the pressing section is pushed against the razor blade, and the razor blade is clamped between the pressing section and the side edge, the expansion portion has a first expansion portion and a second expansion portion both of which are expandable away from themselves by means of an external object to cause the first and the second expansion portions (341, 342) to push against the inner walls of the through hole, and tip ends of the first and the second expansion portions (341, 342) are concealed within the through hole. a housing having a front edge, a rear edge, side edges extended between the front edge and the rear edge, and through holes located between the front edge and the rear edge; at least one razor blade located between the front edge and the rear edge, and the razor blade being assembled on the side edges along a first direction and being limited to move along the first direction by the side edges, the first direction being a direction from up to bottom along the housing; and a clamping piece, the clamping piece having a pressing section across the razor blade and an insertion section bent from the pressing section and inserted into the through hole along the first direction, the razor head being characterized in that a separation notch is provided on the insertion section and extended through an end of the insertion section along the first direction to form an expansion portion which is expanded toward inner walls of the through hole, the pressing section is stretched by means of the expansion portion, the insertion section is prevented from being drawn from the through hole along an opposite direction of the first direction due to the expansion portion, the pressing section is pushed against the razor blade, and the razor blade is clamped between the pressing section and the side edge, the expansion portion has a first expansion portion and a second expansion portion both of which are expandable away from themselves by means of an external object to cause the first and the second expansion portions (341, 342) to push against the inner walls of the through hole, and tip ends of the first and the second expansion portions (341, 342) are concealed within the through hole.