Introduction The Deutsche AIDS-Hilfe (DAH), the National German AIDS Organisation, was founded in September 1983 in West Berlin. Following the first prevention campaigns in 1984 and 1985, the need was identified to investigate to what degree the information materials had affected the knowledge and behaviour of gay men in Germany. To this end, Gerd Paul, then board member of the DAH, contacted the author in 1986 to discuss the design of a study. It was decided in the summer of 1987 to implement a questionnaire based on an instrument used by Michael Pollack in his survey of gay French men conducted in 1985 and 1986 through the magazine Gai Pied, the leading gay publication at the time in France. (See Pollak, 1988, Schiltz, 1998.) The initial survey conducted in West Germany through the gay German press yielded such useful information that a second wave was commissioned for 1988. Starting in 1991 the Federal Centre for Health Education (Bundeszentrale für gesundheitliche Aufklärung, BZgA) took over the financing of this ongoing study of gay men, a national sample being collected at regular intervals through the gay press. This article provides an overview of the results of the waves conducted in the 1990s with a particular emphasis on the most recent data collected in 1996. The next scheduled collection of data is the end of 1999.