A clinical study was done to investigate how the personality traits of Lumbago are reflected in the Minesota Multiphasic Personality Inventory(MMPI). This study was done on 35 lumbago patients(23 lumbago due to Kidney-asthenia<腎虛腰痛> and 12 lumbago due to Spleen-asthenia<脾虛腰痛>). The results were as follows ; 1. The mean T-scores on each scale were within normal range in lumbago group. 2. The personality traits of lumbago showed elevation seales of Hs, D, Hy. 3. Comparing lumbago due to Kidney-asthenia group with lumbago due to Spleen-asthenia group, scale of HS, D, Hy, Pa(P<0.05) were significantly higher in the former. 4. According to pattern analysis, Psycho-neurotic trait was recognized in 8.70% of lumbago due to Kidney-asthenia group, 33.33% of lumbago due to Spleen-asthenia group. This finding supports the existing hypothesis that Spleen-asthenia(脾虛) are strongly related to Seven-modes-of-emotions(七情) than Kidney-asthenia(腎虛).