Abstract: The invention relates to a catheter for transanal irrigation comprising a distal section (1) sufficiently rigid to be introduced into the rectum of a patient and provided with a rounded tip (3), a proximal section (2) intended to be connected to a source of irrigation liquid and a conduit channel (5) for irrigation liquid, opening out through at least one opening (6) close to the distal tip (3) of the distal section (1). The catheter is characterised in that the distal section (1) of the catheter is provided with an inflatable distal balloon (7) and an inflatable proximal balloon (8) intended to be positioned inside the rectum. The catheter is provided, moreover, on its distal section (1), close to the junction with the proximal section, with a mark that makes it easy to introduce the catheter and indicates to the patient the maximal extent of introduction of the catheter into the rectum.