The study was conducted to study the effectiveness of Behavior Based Safety (BBS) interventions in an effort to reduce unsafe action (how to lift patients from wheelchair to bed) with a nurse in the inpatient unit 1 Hospital Dr. Saiful Anwar (RSSA) Malang “.This study was a pre-experimental design with treatment design approach of one group pre-test and post-test design with a number of research subjects were 42 people in the inpatient unit 1, analyzed by using McNemar Tets. The method used was by means of a questionnaire, observation, interview and intervention. Intervention is given in the form of video playback associated with lifting a patient from a wheelchair to a bed. Variables used in this research was unsafe acts (unsafe action) collected through methods Critical Behavior Checklist (CBC) and the level of knowledge and characteristics of the study subjects were collected through questionnaires. McNemar test results on the level of knowledge gained value with p- value of 0.007. That is, there is a difference between knowledge before and after the intervention. Whereas the McNemar test results against unsafe acts (unsafe action) obtained p-value of 0.359. This means that there is no difference before and after intervention. Therefore, it can be concluded that the intervention of Behavior Based Safety (BBS) given to nurses in the inpatient unit 1 RSUD Dr. Saiful Anwar effective only on the level of knowledge with a 77.6% rate of effectiveness. Keywords: Effectiveness, Behavior Based Safety (BBS) Interventions, Unsafe Action, McNemar Test.