Objective: to analyze variation in craving levels according to individual and behavioral characteristics of crack cocaine users at two public treatment services in Pelotas, Rio Grande do Sul, Brazil. Methods: this was a cross sectional study with a sample of 133 participants; the Cocaine Craving Questionnaire scale was used to verify craving levels. Results: 86% of interviewees had moderate and severe craving levels; regarding individual factors, a higher level of severe craving was found in women (45%), those with brown skin color/"mestizos" (60%), low schooling (46%) and minor psychiatric disorders (59%); regarding behavioral factors, the level of severe craving was higher in users who divorced the last year (44%), those who had problems with the Law (61%), those who practiced violence acts (57%), those using more than four psychoactive substances (67%), and those with heavy crack consumption (57%). Conclusion: almost all crack users were found to have high craving levels; these were proportionally higher in some individual and behavioral variables.