Rectal sexually transmissible infections are a common health concern for men who have sex with men but little is known about these infections among men who have sex with both men and women. Self-obtained rectal specimens were collected from a diverse sample of behaviourally bisexual men. From a total sample of 75 bisexual men, 58 collected specimens. A relatively high prevalence of rectal Chlamydia trachomatis infection was found. Participants who collected specimens reported overall acceptability and comfort with self-sampling. Future efforts are needed focusing on increasing awareness of and options for rectal sexually transmissible infection testing among bisexual men.