This study aimed to investigate the construct of burnout in counseling trainees using item response theory. The psychometric properties of the Maslach Burnout Inventory-General Survey for Students (MBI-GS(S)) were examined with a sample of counseling trainees (N = 246). Based on the graded response model, the results supported only the three-factor solution of counseling trainees’ burnout and provided little evidence for general burnout as a potential construct. Specific item-level information from multidimensional item response theory analysis is also presented, including item discrimination parameters, item difficulty location parameters, test information, and reliability. Implications for assessing and addressing counseling trainees’ burnout in terms of educating future mental health professionals are discussed.