To analyze the changes of range of motion and manifestation frequency of impingement sign according to ages in shoulder impingement syndrome after excluding complete rotator tears by MRI, the authors reviewed 74 patients whose impingement injection tests to the subacromial space were positive in the Dankook university hospital. We used paired student t-test for comparison with the contralateral shoulder. l. Average forward elevation, abduction, external rotation and internal rotation of the shoulders were not significantly different in stage I and II, but significantly different statistically in stage II over 40 years old. 2. Average external rotation at 90degrees abductions of the shoulders was not significantly different statistically in stage I, II and stage II over 40 years old. 3. Frequencies of the painful arc were 83% in stage I, 71% in stage II and 58 % in stage II over 40 years old. Physical examinations of painful arc in 1 case of stage II, 7 cases of stage II over 40 years old were impossible because of limitation of motion. 4. Frequencies of lateral impingement sign were 100% in stage I, 86% in stage II, 100% in stage II over 40 years old. Frequencies of Neer's impingement sign were 75% in stage I, 67% in stage II, 88% in stage II over 40 years old. Frequencies of Hawkins impingement sign were 67% in stage I, 62% in stage II and 82% in stage over 40 years old. Except external rotation at 90degrees abduction, range of motion of the shoulder may be decreased in impingement syndrome over 40 years old. Because of difference of frequencies, more than two impingement signs should be tested for the diagnosis of shoulder impingement syndrome.