Objectives: Patellofemoral pain syndrome (PFPS) is common in both the sporting and general communities. With an increased demand on physiotherapists to be accountable and to justify treatment interventions, accurate and reliable measures of this condition are required. This study investigated the test retest reliability and inter-relationship of five self-report questionnaire indices used in PFPS to measure functional limitation or severity of pain, in general or during specific aggravating activities for PFPS. Design: A repeated measures and correlational design. Participants: Fifty subjects (17 male, 33 female) with PFPS aged 23·8 (±S.D. 8·9) years. Procedures: All subjects completed the questionnaires concurrently along with an evaluation form seeking their opinion about each questionnaire. A subgroup of 24 subjects completed the questionnaires again after 2 days. A Latin Square design was used to randomize the order in which the questionnaires were completed. Results: Test retest reliability was high with ICC (3,1) values ranging from 0·77 to 0·95. There were only moderate correlations between the questionnaires (Pearson r=−0·34–0·66) suggesting that they may be measuring different aspects of PFPS. Patients reported strengths and weaknesses for each questionnaire. Conclusions: Test retest reliability was good for all questionnaires. Further work is needed to establish a reliable, user friendly and clinically useful measure for the evaluation of PFPS.