The present invention provides a catheter capable of achieving favorable maneuverability and back-up support. This catheter, which has a lumen and is introduced and retained in a lumen of a living body, is characterized in that: said catheter has a deforming region (10, 30) that is parallel to the lumen of the catheter and extends in the axial direction said deforming region (10, 30) is configured so that when the catheter is curved and forms a curved section, the deforming region migrates to the inside of the curved section at least a portion of the outer surface of the catheter is covered with a surface-lubricating layer the outer surface of the catheter in at least a portion of the deforming region (10, 30) is provided with a low slippage section (5, 25) having a lubricity lower than the surface-lubricating layer and the surface-lubricating layer and the low slippage section (5, 25) are provided at the same position of the catheter in the axial direction.
