The purpose of this study is to develop a pictorial attachment story test for preschool children. In the pilot and preliminary study, a set of ten pictures depicting attachment story stem and six coding scales were developed. In checking for validity, the test was measured for psychometric properties using samples from 152 children aged 4-6 in the general and clinical population. The results are as follows. First, by testing for internal consistency, inter-rater reliability, and test-retest reliability, the study confirmed the stability and reliability of the pictorial attachment story test. Second, the pictorial attachment story test appears to be a valid measure of the construct of attachment representation. The result of confirmatory factor analysis showed that it had sound construct validity. In addition, comparison with the contrasted group provides additional evidence of construct validity. In summary, there is sufficient evidence that this instrument is a developmentally appropriate assessment tool to measure attachment representation in preschool children. The pictorial attachment story test showed encouraging psychometric properties. As a tool in clinically relevant research, it could provide a window into a child s experience and expectation of caregiver s availability and responsiveness.