A path mechanism and an information processing device having the path mechanism can guide disc media to a predetermined position without the data recording area of the disc being affected. The path mechanism has a stacker tray 101 that forms a guide path 130 through which media M having an annular data recording area can move by sliding. The stacker tray 101 has a pair of guide surfaces 125c and 126c that support an outside circumference part of the media M slidably in the direction of media M travel. The guide surfaces 125c and 126c are formed to a width W that is less than the width A of the non-data-recording area Y rendered on the outside circumference side of the annular data recording area on the data recording surface of the media M.