Purpose Quality of life (QOL) of living-lung donor has not been fully investigated. This study aims to examine QOL of the donors in living-donor lobar lung transplantation. Methods and Materials A cross-sectional study was performed on living-lung donors at Okayama University Hospital using the Short Form(SF)-36 questionnaire. Generic questionnaire measuring eight domains of their quality of life summarized into overall physical and overall mental health. Linear transformations were performed to transform scores to norm-based scoring in the general Japanese population (mean=50, SD=10). Forty-two living-donors and 43 patients who received lobectomy due to their own lung disease as positive control participated in the study. Results There was no donor mortality in the living-donor group. The living-donor group was younger than that of the positive control. In norm-based scoring of SF-36 profile, all dimension score of the living-donor group were more than 50, and general health (p<0.0001) and vitality (p<0.005) were significantly higher than those in the positive controls. Overall, the physical composite and the mental composite summary scores in the living-donor group were more than 50 and the mental composite scores was significantly higher than that in the positive control (p=0.01). Living-donor group was the only significant factor associated with high mental composite score (r 2=0.07, p=0.02) in Step-wise multivariate analysis. Lower mental composite score was seen in the living-donors whose recipient died after transplantation (p=0.02). Conclusions Lobar lung donation from living-donor did not decrease the donor QOL after surgery. Living-lung donors seemed to be satisfied with mental health when their recipient received favorable outcome.