Since Charnley has carried out cemented total hip arthroplasty, long term result with early techniques of cementing revealed high prevalence of component loosening, severe osteolysis that makes the surgeon difficult to revise. So uncemented hip arthroplasty with biologic bone ingrowth were developed to solve the problems of cemented arthroplasty. But for nearly two decades, concern about bone resorption and thigh pain has been used as a reason to avoid porous coated uncemented stem. Accordingly, authors address these issues with seventy two patients who were followed up for minmum one year after primary uncemented total hip arthroplasty. The following results were obtained. 1. With regard to the average number of bone resorption sites per cases, 5.17 at two years was increased twice compared with 2.77 at one year and most frequent bone resorption site was Level I. 2. Bone resorption was increased with larger sized stem and tighter fitted stem. 3. Overall incidence of thigh pain was 54.2%, but incidence of moderate thigh pain was clinically significant was 20.8%. Incidence of thigh pain was decreased as long as stem was tightly fit, and there was no correlation between fibrous line and thigh pain, 4. In terms of shape of femoral canal, 84% of cases were normal and the rest of them were stove-pipe, but champagne-flute shape was not present. Overall incidence of thigh pain and clinically significant moderate thigh pain were significantly higher for cases of stove-pipe canal shape compared with those of normal shape. So, another kind of method for fixation of implant should be considered for the cases with stovepipe shape canal.