To enhance track position accuracy to stabilize an output in reading or writing when reading or writing magnetic information while carrying a flexible magnetic information medium along the circumference of a drum.

This device comprises a medium carrying reference surface 8 that is a contact portion provided on one side of a medium carrying passage 3 so that the carrying directional edge of the magnetic information medium makes contact therewith and forms a reference position of the magnetic recording part of the magnetic information medium to the magnetic head 7. The drum 4 is inclined relatively to equipment other than the drum 4 in the direction of extending the space between the drum 4 and a carrying means 5 in the vicinity of the magnetic head 7 or in the direction of reducing the pressure between the both.