Breast cancer and its treatment change the perception of mastectomized women of their physical appearance, which leads to depression and has a negative effect on the overall quality of life of those woman. We wanted to assess the quality of life and the degree of depression of patients suffering from breast cancer, on the basis of a standardised questionnaire to assess the patients' quality of life (QLQ-C-30 BR-23), and the degree of depression using Beck's Depression Inventory (BDI, II). The research was conducted on a sample of 160 patients, who were surveyed before and after the surgical procedure. The inclusion criteria for the research were: patients suffering from breast cancer aged between 18 and 70 years, cancer diagnosed by FNB or CORE biopsy. The patients were divided into two groups: patients having breast-conserving surgery and patients having radical surgical treatment. There were 47 or 39.37% patients who underwent breast-conserving surgery and 113 or 70.62% patients who underwent radical surgery. The results of the survey conducted show that there was no difference in the quality of life of patients before and after surgery, regardless of the type of surgical procedure undertaken. However, there was a significant different in the degree of depression between patients subjected to different surgical procedures, where the patients surveyed post-surgery after radical mastectomy showed a higher degree of depression than the patients surveyed after breast-conserving surgery. There is no difference in the quality of life before and after surgery, regardless of the type of operation. However, there is a significant difference in the degree of depression in patients after radical mastectomy, who showed a higher degree of depression than the surveyed patients who underwent breast-conserving surgery.