Loss is a phenomenon that can be encountered in every moment of life. As a matter of fact, apart from human relations, the same phenomenon can be encountered in human-pet relations. The aim of this study is to learn the mourning process of the individuals who lost their pet and how they cope with their emotions. In qualitative researches, interview technique,which is a method of data collection, was used.Semi-structured interview form, informed consent form, demographic information form was used during the interviews. The sample consists of 18 volunteer participants who lost their pets.The criterion of the sample selected by the criterion sampling method; the individual has lost the pet he has been feeding in the last six months.The interviews were conducted at the time and place determined by the participants.The results were analyzed by content; it is grouped under two themes with the mourningprocess and ways of coping.In the theme of the mourning process; emotional, cognitive, behavioral response sub-headings are included in the process.The theme of coping includes sub-headings such as social support, feeding street animals, and acquiring another pet.This study, which considers the concept of mourning as a reaction after the loss of a pet in a different way than the loss of a loved one, is valuable in order to see how the mourning process works in different situations.Further studies are recommended to find out how coherent the coping patterns are given in response to the mourning process after the lost pet.