Abstract
Teamwork (TW) does not work effectively in designer organizations (DO). This study aimed to
design effective training for improving the TW of DO and verify its effectiveness. Leadership skills (LS) of managers have been shown to be effective in improving the TW of DO. Therefore, we designed and implemented project management training (PMT) based on the PM theory, which is effective for managerial LS, while considering the characteristics of DO. The effects of PMT were examined by questionnaires and interviews on changes in skills. The PMT was administered to seven DO managers, the LS and TW of managers improved before and after PMT, demonstrating favorable changes in skills. This shows that PMT in DO is effective in improving TW.