The invention relates to a rotary guide (1) for guiding at least one line (2) between two points (3, 4), which can be rotated relative to each other, without interruptions. Two receiving parts (12, 14) for receiving a respective sub-section of two sub-sections (29, 31), which are to be wound about the common rotational axis (X) in opposite directions, of a line section (2a), which can be received in the rotary guide (1), can be rotated relative to each other about a rotational axis (X). A deflecting unit (16) supports a deflecting region (18), in which the line section (2a) of the line (2) changes over between the opposite sub-sections (29, 31) in order to deflect the line (2) to be guided from one receiving part (12, 14) to the other receiving part (12, 14) in the event of a relative rotation. Each of the receiving parts (12, 14) has a spiral-shaped receiving groove (20, 22) with a plurality of windings (24, 26) for receiving a line section (2a), said windings running about the common rotational axis (X) from a starting radius (ra) to a final radius (re), wherein the windings (24, 26) lie on a plane perpendicular to the common rotational axis (X). The deflecting unit (16) has an active surface (33) which extends or can be adjusted radially between the starting radius (ra) and the final radius (re) and which interacts with the receiving grooves (20, 22) in order to transfer the line section (2a) from the receiving groove (20, 22) of the one receiving part (12, 14) to the receiving groove (20, 22) of the other receiving part (12, 14) in the event of a relative rotation.