Purpose：The purpose of present study was to determine effects of action observation training on upper limb function after stroke. Training was progressed to imitation and intensive training after observation to required action in ADL. Methods：Among the single case study was used to ABA design. pre base line(A) was only collected participant information without intervention in 5 times. action observation intervention(B) was carried out 10 times and 5 times to base lime(A) after intervention. Results：Results indicated that 10-second test, box and block test, manual function test was increased when compared action observation intervention(B) to pre base line(A). Conclusion：To stroke action observation training was evaluated gross manipulation, dexterity and upper limb function in related with ADL. action observation training benefits were maintained after intervention(B) and showed improvement on upper limb function of stroke.