The objective of this study is to describe the conceptions about the nature of science of 6 chemistry teachers working in private, subsidized, and municipalized schools in the province of Concepción - Chile, who have participated in a series of teacher training and reflection workshops. The data were collected from a Likert-type questionnaire designed to determine the teachers' image of science. The results show a significant change with respect to their epistemological thinking at the beginning of the workshops, and that together with a metadisciplinary and reflective training, have caused a resignification on the conceptions about the nature of science.