The aim has been to design a tool to assess social skills in initial teacher training students in Chile. Has been design a preliminary instrument to which a content validation was performed by expert judgment and analysis of reliability. The results show an instrument with relevant and consistent dimensions to concept, with reliability alpha = .92. The instrument stay composed with 41 items, divided into 5 dimensions. Its use would favor the evaluation and generation of strategies to strengthen social skills in initial teacher training. (C) 2015 Published by Elsevier Ltd.