Teacher's pupil control ideology is a central feature for the quality of the teacher-student relationship, which, in turn, impacts the teacher's level of well-being. The pupil control ideology refers to a teacher's belief system along a continuum from humanistic to custodial views. Teachers with humanistic orientation view students as responsible and, therefore, they exert a lower degree of control to manage students' classroom behaviors. Teachers with a custodial orientation view students as untrustworthy and, therefore, they exert a higher degree of control to manage students' classroom behaviors. The relationship between pupil control ideology and dysfunctional beliefs originated from the cognitive-behavioral therapy framework has not been investigated, despite existing evidence suggesting that the pupil control ideology is linked to stress and burnout. One hundred fifty-five teachers completed a set of self-report questionnaires measuring: (i) teacher's pupil-control ideology; (ii) perfectionistic and hostile automatic thoughts; (iii) irrational beliefs; (iv) unconditional self-acceptance; (v) early maladaptive schemas; and (vi) dimensions of perfectionism. The result suggests that teachers who adopt a custodial view on pupil control ideology endorse more dysfunctional beliefs than teachers who adopt a humanistic view. They tend to present a higher level of perfectionism, unrelenting standards, and problematic relational beliefs, including schemas of mistrust and entitlement. They also present more often other-directed demands and derogation of other thoughts. Such results picture a dysfunctional view on pupils who misbehave, as adversaries who threaten their rigid and/or perfectionistic expectations.