Purpose: Oral Health Impact Proőle (OHIP-49) and a shorter version of that (OHIP-14) are the most comprehensive, accessible, and common scales to measure the impact of the treatment on quality of patient’s life. Our aim was to evaluate the effect of non-surgical periodontal therapy on quality of generalized chronic periodontitis patients’ life by using the Turkish version of the OHIP-14 scale (OHIP-14-TR). Method: 58 patients (21 women and 37 men) diagnosed with generalized chronic periodontitis and requiring non-surgical periodontal therapy were recruited in this study. All patients were asked to őll in a form containing demographic, socio-economic information, reason of dental visit and oral hygiene habits. Clinical periodontal parameters (Plaque index (PI), gingival index (GI), probing pocket depth (PPD), clinical attachment loss (CAL), and bleeding on probing (BOP)) were recorded at baseline, and 1 month after treatment. Non-surgical periodontal therapy, including scaling and root planing, was completed in two appointments over the course of one week. OHIP-14-TR questionnaires have been őlled out before and after treatment. Results: There were signiőcant decreases in all periodontal parameters and OHIP-14-TR one month after non-surgical periodontal treatment (p<0.001). There were signiőcant positive correlations with OHIP-14-TR, PI, and GI (respectively; p=0.024. p=0.026). On the contrary there were no correlations between OHIP-14-TR, and BOP, PPD, and CAL (p>0.05). Signiőcant positive correlation was found between physical pain, and BOP and PPD. After periodontal treatment, BOP, PPD, and physical pain decreased. Conclusion: Non-surgical periodontal treatment was found to be successful in improving patients’ quality of life, according to the őndings of this study.