Abstract
The present paper aimed to develop concepts explaining how construction workers acquire and transfer their techniquies. Life stories were collected from a pair of two construction workers: a master and a woker who used to be his pupil. After utilizing the tool of Analytical Worksheet, seven concepts were identifiend. It is expected that a general theory on the process of acquisition and transfer of the techniquies will be described using the seven concepts, although the development of which is a futre task.