There were made inquires about estimating of past HAV infection frequency among people working in Province Hospital for Infectious Diseases, Surgery Clinics and in Intensive Medical Care Department of Medical School in Gdańsk. Frequency of antibody-HAV Ig "total" prevalence was a little lower compared to other inquiries of adults population in Poland. Its dependence on age of examined people was very essential. In statistical estimation of examined groups of workers being employed on different posts, it has not been stated any difference in anti-HAV Ig "total" prevalence for people over 35 years old. For people under 35-evidence of HAV infection in the past was really found out more often for workers of infectious departaments.