The aim of this study was to test the relationship between the life history strategies and relationship satisfaction. In the present study APIM was used to determine actor and partner effect of life history strategies on relationship satisfaction. The sample consisted of 215 heterosexual couples between the ages of 19 and 65. The measures used in this study consist of the Mini-K questionnaire, as well as three relationship satisfaction measures – Perceived Relationship Quality Components, Satisfaction Index and Relationship Stability Scale. The results of each measure have been gathered into a single variable, the total relationship satisfaction score. The hypotheses set in this study were partially confirmed. The results of this study show that there are significant actor effects of the life history strategies on relationships satisfaction on both genders. Furthermore, the slower life history strategy is positively correlated with greater relationship satisfaction. There weren’t any significant partner effects of the life history strategies on relationship satisfaction. The analysis of partner similarity and relationship satisfaction correlations shows that men are the more satisfied with the relationship the more their female partner is similar to them on a specific life history strategy, though the same results haven’t been found for women’s perceived relationship satisfaction.