The purpose of this survey is to establish whether, and in which manner, different sources of stress predict the partner relationship quality, as well as to establish differences concerning the gender, age and job of respondents. Sources of stress are defined as individual, interpersonal and organizational, whereas the quality of partner relationship was tested as a degree of satisfaction with the romantic relationship. The survey was conducted on an adequate sample of 100 respondents involved in a partner relationship, similar in terms of gender and aged 18 to 44. Questionnaires were used to measure the sources of stress and partner relationship quality (Hendrick, 1988). The results indicated that all three sources of stress were significantly connected with the partner relationship quality, also that family-related sources of stress were the only significant predictor (β= 0.286, p<0.01). The greater the family-related sources of stress, the poorer the partnership relation quality. Differences were obtained in assessing the individual factors of stress according to gender and age categories.