This research aims to investigate how to develop pre-service teachers in early childhood education through employing group-based problem-solving. Participant in this research are 4th year study of pre-service teachers in early childhood education. Forty seven pre-service teachers were selected in the second semester, academic year 2010 by purposive sampling. Research tools were experiences plan and attributes test of pre-service teachers in early childhood education. Findings revealed that pre-service teachers aware their interpersonal accord and conformity at highest percent than those others. Knowledge, and moral and ethics of pre-service teachers expressed in medium and high levels. While learning management showed in low and medium levels. (Contains 2 tables.) [Financial support for this research was provided by the Faculty of Education, Mahasarakham University.]