A printer comprising: a printing unit having a printing head and a platen positioned opposite the printing head, the printing head being configured to print on a print medium that is fed between the printing head and the platen; a ribbon holding shaft configured to hold an ink ribbon that is wound thereon; a ribbon winding shaft configured to wind and collect the ink ribbon supplied from the ribbon holding shaft; and first and second guide shafts (38, 39) provided along a feeding route of the ink ribbon between the ribbon holding shaft and the ribbon winding shaft to apply tension to the ink ribbon, wherein at least one of the first and second guide shafts (38, 39) has a tilt adjuster that applies a twist to the ink ribbon in a width direction of the ink ribbon through the at least one of the first and second guide shafts (38, 39), wherein the first guide shaft is on the ribbon holding shaft side and the second guide shaft is on the ribbon winding shaft side, and the second guide shaft includes the tilt adjuster, characterized in that: the second guide shaft has a pivoting first end supported by a frame and a movable second end, wherein the movable second end of the second guide shaft is movable by a cam mechanism including a cam that is in contact with the movable second end of the second guide shaft and is rotated to displace the position of the movable second end of the second guide shaft, to apply the twist to the ink ribbon through the second guide shaft. a printing unit having a printing head and a platen positioned opposite the printing head, the printing head being configured to print on a print medium that is fed between the printing head and the platen; a ribbon holding shaft configured to hold an ink ribbon that is wound thereon; a ribbon winding shaft configured to wind and collect the ink ribbon supplied from the ribbon holding shaft; and first and second guide shafts (38, 39) provided along a feeding route of the ink ribbon between the ribbon holding shaft and the ribbon winding shaft to apply tension to the ink ribbon, wherein at least one of the first and second guide shafts (38, 39) has a tilt adjuster that applies a twist to the ink ribbon in a width direction of the ink ribbon through the at least one of the first and second guide shafts (38, 39), wherein the first guide shaft is on the ribbon holding shaft side and the second guide shaft is on the ribbon winding shaft side, and the second guide shaft includes the tilt adjuster, characterized in that: the second guide shaft has a pivoting first end supported by a frame and a movable second end, wherein the movable second end of the second guide shaft is movable by a cam mechanism including a cam that is in contact with the movable second end of the second guide shaft and is rotated to displace the position of the movable second end of the second guide shaft, to apply the twist to the ink ribbon through the second guide shaft. the second guide shaft has a pivoting first end supported by a frame and a movable second end, wherein the movable second end of the second guide shaft is movable by a cam mechanism including a cam that is in contact with the movable second end of the second guide shaft and is rotated to displace the position of the movable second end of the second guide shaft, to apply the twist to the ink ribbon through the second guide shaft.