BackgroundMental health is a major public health priority, especially among refugees. The United Nations Relief and Works Agency for Palestine Refugees (UNRWA) started to integrate mental health and psychosocial support (MHPSS) into its primary healthcare services in Jordan in late 2017. In this study, we aimed to assess of the knowledge, attitudes, and practices (KAP) among UNRWA health staff (HS) in Jordan concerning mental health programme pre-implementation, and their perceived barriers about this MHPSS programme.MethodsA cross-sectional study was conducted among doctors, dentists, nurses, and midwives who work at 16 of the 25 UNRWA health centres in Jordan. The assessment was made using a validated self-administered questionnaire. Data analysis was performed using SPSS (version 22).ResultsOf the participants, 73% (161 of 220) believed that their knowledge of MHPSS programmes was insufficient, with no significant difference (p=0.116) between different categories of staff. Furthermore, 88% (194 of 220) said that they needed more training, 67% (147 of 220) reported that the number of mental health cases is increasing, and 50% (110 of 220) that dealing with these cases is difficult. Reflecting on the past 12 months, 31% of staff (69 out of 220) reported meeting between one and ten children, and 45% (100 out of 220) reported meeting between one and ten adults suspected of having mental illnesses. The most suspected condition was depression (84%; 150 of 220), followed by epilepsy (64%; 140 of 220). The main perceived barriers to implementation included the limited availability of MHPSS policies (87%; 192 of 220), MH professionals (86%; 190 of 220), resources (86%; 189 out of 220), and lack of privacy (14%; 31 out of 220).ConclusionsMost health staff had positive attitudes towards MHPSS programme implementation but felt they lacked the required knowledge. There is a need for training and clear technical guidelines. Perceived barriers to MHPSS programme implementation were consistent with the previous studies and need to be tackled with a structured plan of action.