The reason for research on Muslim samples is the perceived weakness in existing measures of prosocial behaviours. The current study's three aims are: Developing a suitable prosociality scale, examining the links between religiosity, prosociality, anxiety, and satisfaction with life, and investigating the mediating roles of anxiety and prosociality on the link between religiosity and satisfaction with life. The sample consists of 678 Turkish Muslims, 428 females and 250 males, ranged from 14 to 56, with mean age of 31 (SD = 8,973). In the current study, the Individual Religion Inventory, the Turkish Prosociality Scale (TPS), the Satisfaction with Life Scale, and the Generalised Anxiety Scale are applied to the sample. Findings of the correlation matrix indicated positive correlations between religiosity, prosociality and satisfaction with life, and demonstrated that anxiety is related negatively to religiosity and life satisfaction. According to the path analysis, prosociality and anxiety mediate the link between religiosity and satisfaction with life.