The Adult Mentoring Assessment for Extension Professionals will help mentors develop an accurate profile of their mentoring style with adult learners and identify areas of proficiency and deficiency based on six constructs--relationship, information, facilitation, confrontation, modeling, and vision. This article reports on the reliability of this new instrument. Extension agents in 10 southern states completed the assessment, and each construct was analyzed through the use of Cronbach's alpha procedures. All six constructs were well within the acceptable range of reliability. Personnel in other Extension systems and similar organizations can now be confident using this tool for training and development purposes.