In a reciprocating-type electric shaver, an inner blade has an attachment groove which is open downward in a lower end of a side edge. An inner peripheral portion of the attachment groove has an engagement groove which is recessed in an in-plane direction on a wall surface of the side edge and in a longitudinal direction of the inner blade. An inner blade base has a projection at a position corresponding to the attachment groove. The projection can be elastically deformed in the in-plane direction on the wall surface of the side edge and in the longitudinal direction of the inner blade, and is formed so that an engagement claw disposed in a distal end of the projection can enter and engage with the engagement groove. The engagement claw engages with the engagement groove, thereby causing the inner blade to be fixed to the inner blade base.