A catheter holder used to hold a catheter in a predetermined state, which includes a sheath configured to be inserted into a body cavity of a living body, an outer tube provided on a base end side of the sheath , an inner shaft inserted into the outer tube to be movable back and forth, a connector part provided on a base end side of the outer tube and configured to accommodate the inner shaft therein, and a hub provided on a base end side of the inner shaft , wherein the catheter holder comprises: an attachment section configured to be attachable to a holder tube that accommodates at least a portion of the sheath in a wound state; a support section formed to extend from the attachment section toward a direction away from the wound holder tube; and a fixing section provided on a second end side of the support section , which is opposite to a first end side of the support section on which the attachment section is provided, the fixing section being configured to fix the connector part and/or the hub to hold the outer tube , which is exposed from an opening portion of the holder tube, in a linear shape to be fixed in position, characterized in that the fixing section includes: a hub side fixing part configured to fix the hub to restrict rotation of the hub and to release fixing of the hub when force is applied in a direction of relatively separating the hub therefrom; and a connector-side fixing part configured to fix the connector part with fixing force smaller than fixing force of the hub -side fixing part for fixing the hub and to restrict a movement of the connector part in a direction away from an axial center of the outer tube . an attachment section configured to be attachable to a holder tube that accommodates at least a portion of the sheath in a wound state; a support section formed to extend from the attachment section toward a direction away from the wound holder tube; and a fixing section provided on a second end side of the support section , which is opposite to a first end side of the support section on which the attachment section is provided, the fixing section being configured to fix the connector part and/or the hub to hold the outer tube , which is exposed from an opening portion of the holder tube, in a linear shape to be fixed in position, characterized in that the fixing section includes: a hub side fixing part configured to fix the hub to restrict rotation of the hub and to release fixing of the hub when force is applied in a direction of relatively separating the hub therefrom; and a connector-side fixing part configured to fix the connector part with fixing force smaller than fixing force of the hub -side fixing part for fixing the hub and to restrict a movement of the connector part in a direction away from an axial center of the outer tube . a hub side fixing part configured to fix the hub to restrict rotation of the hub and to release fixing of the hub when force is applied in a direction of relatively separating the hub therefrom; and a connector-side fixing part configured to fix the connector part with fixing force smaller than fixing force of the hub -side fixing part for fixing the hub and to restrict a movement of the connector part in a direction away from an axial center of the outer tube . <EOS>