Microteaching provides a valuable setting for preservice teachers to practice teaching prior to real classroom teaching experiences, as well as allowing teacher educators to observe the strengths and weaknesses of the preservice teachers' pedagogical content knowledge. Therefore, we studied the preservice mathematics teachers' microteachings, with an aim to investigate their pedagogical content knowledge as reflected in their microteaching. Twenty preservice secondary mathematics teachers participated in the study. The participants formed groups of two, three or four people of their choice, resulting in six groups in total. Each group designed and conducted a microteaching on a topic of their choice. The videotapes of the groups' microteaching and their lesson plans constituted the data set for the study. We analyzed the data per the components of the pedagogical content knowledge framework outlined by various researchers. We found that the preservice mathematics teachers in general were knowledgeable about different instructional strategies and the curriculum about the topic of their microteaching, but their knowledge of learners was relatively poor. Implications for teacher education are discussed.