The purpose of the research is to compare critical thinking disposition of the students in the faculty of education, Turkish and Mathematics teaching. The sample is 194 randomly chosen first and last year students from Kocaeli University and Sakarya University education faculties. As a means for data gathering "California Critical Thinking Disposition Inventory" developed by Facione, Facione and Giancarlo (1998), adapted to Turkish by Kokdemir (2003), is used. In conclusion; it occurs that the students' critical thinking disposition do not significantly vary in grade levels (p>0.57, t=0.59) and gender (p>0.15, t=1.47), but vary in departments (p<0.00, t=2.82). Accordingly, the training is suggested to be enriched by the activities that improve students' critical thinking disposition.