  Using adaptive optics we study the binary population in the nearby OB
association Scorpius OB2. We present the first results of our near-infrared
adaptive optics survey among 199 (mainly) A- and B-type stars in Sco OB2. In
total 151 components other than the target stars are found, out of which 77 are
probably background stars. Our findings are compared with data collected from
literature. Out of the remaining 74 candidate physical companions 42 are new,
demonstrating that many stars A/B stars have faint, close companions.
