Objectives. To develop a brief questionnaire to measure male sexual fu
nction. Methods. An initial set of questions was refined and reduced t
hrough cognitive testing and two serial validation studies. In each st
udy, men were recruited from a sexual dysfunction clinic and a general
medicine practice to complete the instrument. Test-retest reliabiliti
es, internal consistencies, and construct validities were examined. Re
sults. The final instrument covers sexual drive (two items), erection
(three items), ejaculation (two items), perceptions of problems in eac
h area (three items), and overall satisfaction (one item). Psychometri
c performance was generally very satisfactory, although self-assessmen
ts of ejaculate volume are problematic. Translations have been develop
ed and pilot tested in a number of languages. Conclusions. The Brief S
exual Function Inventory may be useful for measuring male sexual funct
ion in practice and research.