The invention discloses a reader convenient to mount and dismount. The reader comprises a U-shaped clamp, a support rod, bolts, a connection rod, a groove block, a support block, a support plate, fasteners, a reader body, a cushion block, a fixing button, slots, a switch, a loudspeaker, a U disk jack and a charging jack, wherein the support rod is arranged on one side of the upper end of the U-shaped clamp; the upper end of the support rod is rotationally connected with the connection rod through the bolt; the connection rod is connected with the bottom of the groove block; the support block is arranged in a groove of the groove block in a sleeving manner; the groove block is connected with the support block through the bolt; the support block is connected with the support plate; the slots are formed in the support plate; the fasteners are arranged on the back of the reader body; and the reader body is connected with the support plate through the slots and the fasteners. The reader can be clamped on the edge of a table through the U-shaped clamp and is fixed through the fixing button; the U-shaped clamp is convenient to mount and dismount; and the reader body is connected with the support plate through the slots and the fasteners, so that the reader body is convenient to mount and dismount.