A card reader with magnetic heads, an anterior frame, a main body frame, a control board and a sealing member formed to be annular. The main body frame has a head arrangement in which the magnetic heads are positioned, a sac-like card cage in which the rear end of the inserted card is housed, and a seal arrangement which is formed between the head arrangement and the card cage and in which the sealing member is arranged. The anterior frame has a substantially cylindrical cylinder portion formed to connect to a front face portion. A rear end side portion of the cylinder portion (crushing portion) crushes the sealing member in the radial direction from the outer circumferential side of the sealing member. The control board is arranged outside the card cage, and the inner circumferential face of the seal crushing portion is formed in a tapered shape.