Work is an important element of everyone's life – it allows us to develop our skills, feel need and useful, the workplace is also the place where we make new friends, do not feel lonely (even if we are lonely in our lives) and is the place we often spend several dozen hours each week. Work must therefore be a safe place where the employee will not experience violence, manipulation and discrimination. The subject of this study is to present the phenomenon of gaslighting in employment relations (with particular emphasis on the employment relationship) as a still-current challenge of counteracting psychological violence at work. This phenomenon causes numerous difficulties with early detection of violence in employment, because the victim, as a result of the manipulation he experiences, ceases to believe in his own judgement and questions his own mental health.