In order to study the effect of harvesting time on multiple regression of dermining germination and path analysis of kidney bean cultivars, this study conducted in Karaj Seed and Plant Improvement Institute in 1996 on 16 Red bean cultivars contain: LQk-29, KIP31, AND-1007, D-18083, DOR-364, AND-925, MOC- 59, MCD-2004, DOR-476, DCD 2004 RAB-58, RAB-484, RAB-505, XAN-194, RAP-50, GOLI NAZ, therefore after harvesting seeds in 3 stages before physiological rippening, physiological ripening and fully maturation, germination test and some vigour tests as Cold Test(CT), Accelerated Aging test(AA), T4, T7, EE, WE, WS, WE/ WS, LE/ LS, 100WS, ECS, ECW were done in the basis of randomized complete design with 4 replications. The results showed that, in the case of before physiological harvesting(T1) enter of independent variables CT, T7, LE/LS and WE/WS in multiple regression model with estimated variable 0.140716, 0.200634, -0.1353, 143.2916 and 3105.4628 and (b0) -76.69 estimated %96.30 of germination percent In the case of physiological harvesting (T2) enter of independent variables CT, T7 in multiple regression model with estimated variable 0.4894 and 0.3212 and (b0) -8.059 predicated %62.06 of germination percent. calculated model of fully mature harvesting (T3) showed independent variables T4, LE/LS, WE/WS and AA with coefficient 0.1565, 0.1021, 0.2909 and 0.1565 and b0 (4.12035051) %61.82 of germination percent. Direct and indirect effect relations were studied by Path analysis. The results indicated that, amoung characters and independent variables in fully mature harvesting of 16 red bean cultivars, WE/WS with 0.558 had maximum correlation with germination percent. Its direct effect was 0.022 and did not showed significant effect at %1 level. It seemed that, this high correlation due to indirect effects as WE, 100WS and ECW.