The purpose of this study was to examine the relationship between the earnings of professional librarians and their sex, family circumstances, qualifications, years of professional experience and certain other variables (experience of unemployment, time taken to travel to work, size of town and of institution in which employed). An attempt is thus made to determine whether women librarians earn significantly less than men who are similar with regard to qualifications and other characteristics relevant to their careers. Variables Age, sex, marital status, number of children, year of membership of Library Association, time spent travelling to and from work, size of town/village in which respondent lives and works, annual salary, additional earnings, qualifications (both in and outside Librarianship or Information Science), in-service training courses attended, current employment, hours worked, type of institution, grading scheme, number of professional librarians in library/office, post-school experience, number of years in present institution, number of previous institutions since career started.