HEALTH PROMOTING BEHAVIOR IS INFLUENCED BY VARIOUS FACTORS THAT DEFINE A PERSONS LIFESTYLE. THE OBJECTIVE OF THIS STUDY IS TO DETERMINE THE FACTORS THAT CONDITION THE ADOPTION OF PROMOTING HEALTH CONDUCT IN STUDENTS OF A UNIVERSITY IN CHILE. AN ANALYTICAL, CROSS-SECTIONAL STUDY WAS CARRIED OUT ON 189 STUDENTS; THE HEALTH PROMOTER LIFESTYLE STYLE SCALE, THE GENERAL SELF-EFFICACY SCALE, THE ROSENBERG SELF-ESTEEM SCALE AND A QUESTIONNAIRE TO CHARACTERIZE THE PARTICIPANTS WERE APPLIED. DESCRIPTIVE AND INFERENTIAL STATISTICS AND THE SPSS 22 PROGRAM WERE USED. IT WAS OBSERVED THAT THE DOMAINS OF THE HEALTH PROMOTER LIFESTYLE SCALE THAT HAD THE HIGHEST AVERAGE WERE SPIRITUAL GROWTH AND INTERPERSONAL RELATIONSHIPS WITH A MEAN OF 24.7 (SD = 5.4) AND 23.9 (SD = 4.8) RESPECTIVELY. REGARDING THE RISK FACTORS FOR HEALTH, ONLY MARIJUANA CONSUMPTION WAS RELATED TO HEALTH PROMOTING BEHAVIOR (P VALUE 0.036). IT IS ALSO SEEN THAT THE HEALTH PROMOTION CONDUCT HAS A DIRECTLY PROPORTIONAL AND SIGNIFICANT RELATIONSHIP WITH THE PERCEPTION OF SELF-ESTEEM AND SELF-EFFICACY (P VALUE 0.01). IT IS CONCLUDED THAT, THE GREATER THE PERCEPTION OF SELF-ESTEEM AND SELF-EFFICACY, THE GREATER IS THE ADOPTION OF PROMOTING HEALTH BEHAVIOR.