The purpose of this thesis is to study employee well-being and leadership and thereby to explore what is understood as work-related well-being and what leadership behaviors are considered important in fostering this. I have sought to learn about the two phenomena from the perspectives of the employees. This interpretive-qualitative case study research draws on empirical material generated through semi-structured, one-on-one interviews with six employees working at a large family-owned dental equipment manufacturer, headquartered in Helsinki. The participants were selected by means of purposive sampling and a grounded theory-informed analysis combined with reflexive approach was used for in-depth analysis of the respondents accounts. Individual consideration set of leader behaviors including behaviors such as appreciation, coaching and fairness were perceived to be important for employees well-being. These findings highlight particularly the role of supportive and developing leadership behaviors in fostering well-being at work.