[Problem] To provide a fixing device for a tubular member such as a catheter which is easy to operate, has parts which are easy to tighten, which makes it easy to recognize whether the parts are securely fixed, which is small in size, and which causes minimum irritation of the skin.
[Means for Resolution] A tubular member fixing device includes: a second fixing portion (20) being formed of soft material and including a retaining portion (22) capable of opening and closing for clamping the tubular member (30) and a second base member (21) formed integrally with the retaining portion (22) at a fitting recess (24); and a first fixing portion (1) being formed of material harder than that of the second fixing portion (20) and including a first base member (2) having a covering portion (3) for covering the outer surface (22d) of the retaining portion (22) so as to be capable of opening and closing the opening-closing side of the retaining portion (22) of the second fixing portion (20), and a fitting joint (2a) formed integrally with the covering portion (3) for fitting into the fitting recess (24) of the second fixing portion (20), and the second fixing portion (20) and the first fixing portion (1) are fitted to abut against each other.