The invention relates to a bladder catheter (10), comprising a tube (12), wherein the tube (12) has an insertion section (14) for inserting into a urinary bladder through a urethra and wherein the tube (12) has a connection section (18) for connecting connection elements, wherein fluid can be drained from the urethra at the connection section (18) via the insertion section (14), wherein a closable valve (22) is arranged between the insertion section (14) and the connection section (18) in such a way that the discharge of fluid from the connection section (18) can be prevented while the valve (22) is closed.
