The purpose of this study was to develop an instrument to assess college students' efficacy beliefs for conceptual change and to examine the psychometric properties of the instrument. Participants were 692 students. Results of the confirmatory factor analysis supported the hypothesized single factor structure of Efficacy Beliefs for Conceptual Change Learning Questionnaire providing evidence for the construct validity. Evidence for concurrent validity also is provided. On the basis of the evidence provided in this study, the questionnaire appears to produce valid and reliable scores for college students. With the use of the questionnaire, conceptual change researchers might be able to better assess the relationship between students' efficacy beliefs and the change in their conceptual understandings of various science concepts. (Contains 3 tables.)