Aim:to assess the quality of life of smokers following smoking cessation treatment.Material – Method: 97 smokers were asked to fill out a questionnaire at phase 0; then following designing of a treatment pattern for the first month of the therapy (phase 1); three months later, which actually marks the completion of the cessation program and use of medication (phase 2), and one year after that(phase 3). A socio-demographic factor questionnaire was used together with the EQ-D5 instrument. It is a 5 basic dimensions questionnaire that helps to measure life quality: EQ-D5 features two distinct tools: descriptive system and visual analogue scale (VAS),! the latter using a 0-100 range, with 100 representing the best possible health status. A comparison of differences in VAS observations between phases 2 and 3 was conducted using paired t -test. Results: 56,7% of participants were male whereas 43,3% were female, at a mean age of 55,32 y.o. For a 12-month time frame they chose to quit smoking by using nicotine substitutes at a percentage of 28,6% whereas 41,2% of all participants managed to quit smoking. Calculations performed by using the Fangestrom test showed that the higher percentage, e.g. 42,6%, was found to be moderately dependent on smoking. Results showed a substantial association between the groups created based upon the phase of research and their life quality; therefore, quality of life (EQ-D5 VAS) was lower 1 year after (phase 3) (m= 67,39) compared to phase 2 (3 months after entering the study-completion of the smoking cessation program) (m=70,43) and p-value= 0,001. Conclusion:quitting smoking does affect quality of smoker’s lives by actually improving it and smoking cessation clinics do play a critical role.