The authors analyzed clinical and radiographic results of the 87 cases which had done THRA with porous coated femoral stem followed up more than 2 years to study the difference of clinical and radiologic findings between the absence (group 1 ; 53 cases) and presence(group 2 ; 34 cases) of the porous coating in superolateral portion of the femoral stem. The following results were obtained : 1. Harris hip scores were improved 34.4 points from 56.5 points preoperatively to 90.9 points postoperatively in group ?, and 32.7 points from 61 points preoperatively to 93.7 points postoperatively in group 2. The clinical results of the group 1 were Excellent in 45 cases, Good in 5 cases and Fair in 3 cases, and clinical result of the group 2 were Excellent in 33 cases and Good in 1 case. 2. The changes of femoral stem angle were below 2 degrees in 7 cases, above 2 degrees in 2 cases in group 1, and below 2 degrees in 5 cases, but not found more than 2 degrees of change of the femoral stem angle in group 2. 3. The osteolysis around femoral stem were 15 cases(28%) in Group 1, and 5 cases(15%) in Group 2. Diffuse osteolysis were 3 cases in Group 1, but was not observed in Group 2. 4. The vertical subsidence more than 2 mm was 3 cases in group 1, but was not observed in group 2. 5. The stable femoral stem were 51 cases in group 1, and 34 cases in group 2. The unstable femoral stem were 3 cases in group 1, but was not observed in group 2. Above results suggest that the porous coating in the superolateral portion of the femoral stem showed better results in radiologic and clinical findings in short term follow up.