Abstract Objectives: to estimate the prevalence of drug abuse in pregnant women and to associate with the variables education, family income, race and number of pregnancies. Methods: descriptive, cross-sectional, quantitative research. Developed in the municipality of Bandeirantes-PR, from June 2016 to December 2017. The population was 114 pregnant women and the dependent variables were alcohol / tobacco use and illicit drugs and the independent variables were education, race, family income and number of pregnancies. The analysis was the comparison between the variables and Microsoft Excel 2007 and SPSS 20.0 was used. It was approved by the Ethics Committee. Results: the use of drugs of abuse during pregnancy was 19.2%, presenting as a sociodemographic profile characterization the age between 19 to 29 years, predominance of nonwhite race, with study time ≤ 9 years, with income from 1 to 2 minimum wages and multiparous women. The most commonly used drug of abuse was alcohol, followed by tobacco. Concomitant use between drugs was significant with alcohol and tobacco / illicit drugs and tobacco. Conclusions: drug use had a prevalence of 19.2% and acts in conjunction with social issues and this case, intervening is necessary with an individualized care plan, thus ensuring the promotion and prevention of maternal and child health.