We propose two fundamentally different motives for helping: gaining pleasure and fulfilling one’s duty (‘‘pressure’’). Using the newly developed pleasure and pressure based prosocial motivation scale, we demonstrated the distinctiveness of pleasure and pressure based prosocial motivation in three studies. Although the two motives exhibited different relations to a variety of personality characteristics, they were similarly related to trans-situational helping. Of particular interest, pleasure based prosocial motivation was positively related to self-actualization, self-esteem, life satisfaction, and positive affect and negatively related (...) to negative affect. On the contrary, pressure based prosocial motivation was unrelated to self-actualization, self-esteem, life satisfaction, and positive affect but positively related to negative affect. These results qualify research showing that prosocial life goals generally increase subjective well-being. (shrink)