This study was designed to evaluate graft survival, delay graft function and slow graft function between the cadaveric and live-donor kidney recipients. Sixty nine cadaveric kidney transplantations were done since may 2008 in Labbafinejad Hospital, Shaheed beheshti University of Medical Science, Tehran, IRAN .Demographic data, graft survival, delay graft function (DGF),slow graft function(SGF) and mortality rate were compared with a control group. We defined DGF as the need to dialysis in the first post-operative week and SGF as serum creatinine of higher than 2mg/dl on 3rd post-operative day. RESULTS: 65 (group 2) and 128 (group 1) kidney recipients from cadaver and live donor were enrolled into the study. Male/Female ratio in group 1 was 88/40 and in group 2 was 42/23 (p value=0.6). Mean age in group 1 was 44/6 +- 10/8 and in group 2 was 44/6 +- 11/3(p value=0.9). Graft survival was not different between the two groups (p value=0.5) The first day creatinine in group 1 was 3/7 +- 2/25 and in group 2 was 4/7 +- 2/8 (p value=0.01). The 3rd day creatinine in group 1 was 2/02 +- 1/7 and in group 2 was 2/6+- 2/4 (p value=0.04). The 7th day creatinine in group 1 was 1/8 +- 2 and in group 2 was 1/7+- 1/4 (p value=0.6). 5 patients (%3/9) in group 1 and 3 (%4/8) in group 2 needed dialysis in the first post-operative week (p value = 0.7). Total complication rate was 6 (%4/7) and 5 (%8/1) in groups 1 and 2 respectively (p value=0.3).Mortality rate in group 1 was 4(%3.1) and in group 2 was 7(%10/9) (p value=0.03). In conclusion, Although the rate of SGF was greater in the cadaveric group in our study but DGF and graft survival was not different between the two groups.