Data on 263 cases of mais gonorrhea ocurring from January, 1968 to June 1969, in the City of Rio de Janeiro, are presented. In every oase clinical diagnosis was confirmed through bacterioscopic examination of Gram stained smears. Young adult of low levei socio-economia classes predominated in the studied cases, reaehing higher incidence in the 20 to 24 age group. The mean incubation period corresponded to 4 days (58.9 percent) and 250 cases revealed contagiou through heterosexual intercourse, while 12 cases did not recognize sexual relations. Persistence of symptoms extended beyond one month in more than half the cases, and 9.5 per cent reached more than two months for complete clinical recovery. Penicillin, alone or in association with the sulphamides was sucessfully employed for treatment in most cases, but 49 (18.6 per cent) patients had to receive other antibiotics, due to apparent clinical resistance to the former treatment. Gonorrhea was associateá with other venereal infectious in 14 cases (5.4 percent) mainly soft chancre and syphilis, besides herpes genitalis. Only one case of orchitis was found as a complication of the gonococcal uretritis.