A penile vein-pressing erection promoter includes a main body, a sliding member, a first fixing member, a second fixing member, and a second ring portion. The main body includes a first ring portion. The sliding member, the first fixing member, and the second fixing member are mounted to the main body. The second ring portion is connected to the second fixing member. The first ring portion is used to trap the glans retro-coronal sulcus and the sliding member is use to block returning blood of the glans sinusoids. The first fixing member and the second fixing member block returning blood of the penile cavernous sinusoids through the deep dorsal vein and the cavernosal veins of penis. The second ring portion is used to trap the penile base and thus enlarge the penile volume.
