A support catheter (1) is used together with a guiding catheter 4 in which a treatment catheter (5) is inserted, the guiding catheter 4 guiding the treatment catheter (5) in a blood vessel, the support catheter (1) being inserted in the guiding catheter (4) from a proximal-side opening of the guiding catheter (4) and having such a length that the support catheter (1) protrudes from a distal-side opening of the guiding catheter (4), the support catheter (1) guiding a distal end portion of the treatment catheter (5) to a treatment site. The support catheter (1) includes: a distal shaft (33) forming a distal-side portion of the support catheter, the distal shaft (33) having a tubular shape such that the treatment catheter (5) is insertable in the distal shaft (33)； and a proximal shaft (34) forming a proximal-side portion of the support catheter (1). The proximal shaft (34) is joined to a proximal-side portion of the distal shaft (33) by a modified polyolefin-based adhesive.
