Abstract: A support strap whose lower end is sewn to a hook-and-loop band which encircles the sheath portion of a urine-collecting catheter and the user's penis. Its upper end has male part snaps sewn to it, which cooperate with female part snaps on the undergarment's waistband. The strap and band prevent the external urinary catheter from slipping off of the penis. The band has multiple indicating marks on the loop side and one mark on the hook side, for accurate repositioning of the band each time it is reapplied. A second embodiment has a front section of a garment onto which is sewn a grooved retainer ring, which encircles the penis. An applicator ring is used to spread the rim of the condom catheter to facilitate fitting the condom onto the penis and for fitting the rim into the groove of the grooved retaining ring.