[Object]It is an object of the present invention to provide a catheter for forming a biological tissue holding member by which a body lumen can be maintained in a dilated state even after a procedure of dilating a target part of the body lumen.[Solution]The catheter (100) for forming a biological tissue holding member includes: an elongated main body section (30) having a lumen (31 and 32) through which can flow a curable liquid substance that is cured in a living body a first discharge section (10) through which the curable liquid substance supplied via the main body section is discharged in a filamentous form in a first direction intersecting the axial direction of the main body section a second discharge section (20) which is disposed on the distal side along the longitudinal direction of the main body section as compared with the first discharge section and through which the curable liquid substance supplied via the main body section is discharged in a second direction intersecting both of the axial direction and the first direction a first rotation driving unit (16) which rotates the first discharge section in a first rotation direction and a second rotation driving unit (24) which rotates the second discharge section in a second rotation direction reverse to the first rotation direction.
