This study investigated the impact of hypnotic suggestions on improving attitudes toward seeking professional psychological help (ATSPPH). The study administered the Chinese version of the ATSPPH scale on 303 college students, of which 61 with low levels of ATSPPH were recruited as the participants (male: 18; female: 43). All participants were tested with the Harvard Group Scale of Hypnotic Susceptibility, Form A, prior to the formal experiment and assigned with balancing hypnotic susceptibility in hypnotic suggestion, relaxation, or control groups. The main results were as follows: (1) counter-attitudinal information significantly improved explicit ATSPPH only for the hypnotic suggestion and relaxation groups, (2) the hypnotic suggestion group exhibited improvement in implicit ATSPPH and (3) a difference was observed between explicit and implicit attitudes in the process of providing counter-attitudinal information when changing ATSPPH.