The aim of this study is to describe the perception on competency of the prospective secondary mathematics teachers in terms of general teacher behaviors. The sample consisted of 104 prospective teachers who were about to graduate. The data for the study were collected through "Prospective Teacher Competency Scale" including 5 dimensions and 43 items with a Likert-type grading. The five dimensions were 1) subject matter, 2) designing, planning, and administering instruction, 3) assessment and evaluation, 4) cooperation with others concerned, 5) professional development. As a result of this study, it was observed that prospective secondary mathematics teachers had a "fairly" level of proficiency perception in terms of general teaching behaviors.