PURPOSE: To provide a magnetic card reader/writer that a customer can easily pull out a magnetic card from a main body part, in a magnetic card reader/ writer performing the input/output of magnetic information for the magnetic card.

CONSTITUTION: A magnetic head 17 generating an output when a customer pulls out a magnetic card 1 which is held by a pair of upper and lower first driving roller 4a and a first follower roller 4b provided near the insertion port 3 of a main body part 2 and is stopped is provided between the insertion port 3 and the first driving roller 4a and the magnetic card 1 is ejected from the insertion port 3 by driving and rotating the first driving roller 4a based on the output.