To provide a tag printer with a stacker for surely eliminating no-good tags such as tags with joints or IC tags poor in communication.

The tag printer 100 uses a punched hole sensor 105 for monitoring whether a no-good tag TK1 with a punched hole TK4 formed in tag paper TK exists or not during carrying the tag paper TK. When it determines the no-good tag TK1, a movable part 209 of a solenoid 208 of the stacker 200 is moved out, an opening/closing member 207 is turned from a closing position Z to an opening position Y via a link member 210 with a supporting shaft 212 as a supporting point, and the no-good tag TK1 is guided to another carrying passage different from a regular carrying passage. A discharge carrying motor 222 of the stacker 200 is started to rotationally drive carrying rollers 204, 205, 206 to carry the no-good tag TK1 to the outside of the stacker 200.