Background: In the context of lifelong learning, self-regulated learning is an important competence. Children between 4 and 6 years of age are at a crucial step in their life to develop self-regulatory competence. That is why their kindergarten teachers play an important role as instructors as well as role models. Aim: This study tested the effects of self-regulation training for kindergarten teachers concerning their own self-regulation and methods to foster self-regulation in children at preschool age whom they were teaching. Sample: In this study, 35 German kindergarten teachers and 97 children participated. All adult participants were graduated kindergarten teachers. Method: The kindergarten teachers were tested with a questionnaire 2 weeks before and after the training. At the same time, the preschoolers were interviewed. A waiting control group design was applied. Results and conclusions: The results obtained by means of analyses of variance show that the self-regulation of the kindergarten teachers as well as the self-regulated learning of preschoolers whose kindergarten teachers took part in the training improved significantly. The results indicate that it is possible to improve self-regulated learning of preschool children by a training programme for kindergarten teachers.