Provided are a tube insertion device and a biological-tubular-organ indwelling tube that have a relatively low risk of causing bleeding etc., and with which it is possible to form a puncture hole and insert the biological-tubular-organ indwelling tube merely with relatively simple manipulations. This tube insertion device (1) comprises: a biological-tubular-organ indwelling tube (2) including a tubular tube body (21), and an expanding part (22) that is provided on the outer peripheral surface of the tube body (21) and a catheter (3) that has a pressing member (32) and that can be inserted into the lumen of the tube body (21). The tube body (21) includes a region (212) that is folded up in the longitudinal direction and that is located in a position including at least the section where the expanding part (22) is arranged. While the expanding part (22) is contracted, a portion of the expanding part (22) is housed within a groove (213) in the tube body (21) that is formed in said region (212). Said region (212) is expandable by the pressing member (32) when the catheter (3) is inserted into the lumen of the tube body (21).La présente invention concerne un dispositif dinsertion de tube et un tube à demeure dorgane tubulaire biologique qui présentent un risque relativement faible de provoquer une hémorragie etc., et avec lesquels il est possible de former un trou de ponction et dinsérer ledit tube à demeure dorgane tubulaire biologique simplement au moyen de manipulations relativement simples. Ce dispositif dinsertion de tube (1) comprend les éléments suivants : un tube à demeure dorgane tubulaire biologique (2) incluant un corps de tube tubulaire (21) et une partie dextension (22) prévue sur la surface périphérique externe du corps de tube (21) et un cathéter (3) qui possède un élément de pression (32) et peut être inséré dans la lumière du corps de tube (21). Le corps de tube (21) inclut une région (212) qui est pliée dans la direction longitudinale et qui se trouve d
