A urethral stricture treatment method is disclosed that inhibits recurrence of urethral stricture by imparting an epithelial function to a treatment portion formed by treating scar tissue. The urethral stricture treatment method can include a treatment step of treating scar tissue by using a treatment tool transurethrally inserted into a urethra and forming a treatment portion to which an epithelial function can be imparted, a confirmation step of confirming whether or not the treatment portion has been formed by using a diagnostic tool transurethrally inserted into the urethra, and an assisting step of imparting the epithelial function to the treatment portion by using an assisting means transurethrally inserted into the urethra.
