The purpose of the present research is studying the effects of information and communication technologies (ICT) assisted project based learning practices on ICT integration skills of pre-service classroom teachers. The research adopted a mixed method. The quantitative dimension of the research was designed with pre-test-post-test control groups. The qualitative dimension was conducted as a case study. The work group of the research consisted of 72 pre-service teachers, who studied at the third grade of the department of the classroom teaching of a state university in the province of Konya in 2015-2016 academic year; 34 of the participants were included in the experiment group and 38 were included in the control group. ICT Self-Efficacy Perception Scale (ICT-SEPS) and ICT Attitude Scale (ICT-AS) used as the quantitative data collection tools for the present research were obtained from the literature. The interview form used to collect the qualitative data of the research was developed by the researchers in accordance with the related literature. Comparison of the data collected before and after the 12-week experimental procedure revealed that ICT assisted project based learning practices had positive effects on ICT self-efficacy perceptions and attitudes and accordingly expected ICT integration levels among pre-service teachers.