This book constitutes the refereed proceedings of the 14th International Conference on Subject-Oriented Business Process Management, S-BPM ONE 2023, held in Rostock, Germany, during May 31-June 1, 2023. The 10 full papers and 9 short papers included in this book were carefully reviewed and selected from 24 submissions. They were organized in topical sections as follows: management issues and people; development and requirements; modeling, technology and infrastructure.