The aim of the study was to describe ultrasound findings in chronic groin pain. During a 18 month period 29 consecutive patients with chronic groin pain underwent clinical examination and an ultrasound examination. Pelvic x-ray and bone scintigraphy was usually also performed. Ultrasound pathology was present in all but two patients; 10 patients had more than one positive finding. The findings were located as follows: distal ilio-psoas tendon (11), adductor longus tendon insertion (11), biceps femoris (1), gluteus maximus muscle (1), adductor magnus (1), abdominal wall muscles (2), hip joint (1). In ten patient ultrasound found an inguinal hernia. One patient had a stress fracture and one had an osteoid osteoma, which of course could not be seen by ultrasound. Ultrasound may be an important tool in distinguishing the different conditions associated with groin pain, and may help in the planning of treatment.