The aim of the study was to describe nurses in primary health attitudes to and knowledge about obesity and which nursing activities as they consider that they performed for this patient group. Another aim was to study relationships between knowledge about and attitudes to this patient group and nursing activities. Furthermore, the aim was to examine differences in those variables between the present study and another Swedish study. The design was descriptive, comparative and correlative. A convenience sample was used and 94 nurses participated. The most common nursing activities were to give advice about physical activity and advice about lifestyle. Motivation interviewing was a method that many nurses used. BMI measuring was used by 26 % of the nurses every week while waist measuring was used by 10 %. Few nurses felt disgusted with patients who are obese and they didn’t find them lazier than other patients. The study showed that nurses had god knowledge about health problem related to obesity. A statistically significant relationship was found between the factor personal effectiveness and nursing activities. Organizational support was assessed statistically significant lower in the present study compared to the earlier Swedish study. The conclusion is that nurses have fairly good knowledge but yet the knowledge was not significant related to nursing activities.