Abstract: An indwelling urinary catheter having a simple structure that can discharge urine easily is disclosed. The indwelling urinary catheter comprises a body that includes an inserted part to be inserted into the bladder, and a non-inserted part that is formed in one body with the inserted part and positioned outside of the bladder, a discharging tube installed inside of the body for discharging the urine, the first fixing member formed inside of the inserted part, and an expander one end of which is fixed to the first fixing member. Typical problems associated with the conventional balloon-shaped fixing member are resolved because the indwelling urinary catheter is fixed in a desirable position by an expanding a part of the body. Also, because the indwelling urinary catheter of the present invention needs no additional fixing devices such as the balloon-shaped fixing device but instead can be fixed by the expander, it has a simple structure and enlarged inner diameter of the discharging tube.