Research in Computer-supported Collaborative Learning (CSCL) have sought to understand the types of interaction in collaboration that leads to and explains positive learning outcomes. Mobile learning provides the additional premises that learners are mobile, and mobile technologies are ubiquitous and ready-at-hand, enabling even more opportunities for learners to share and co-construct knowledge readily in different settings and modes. Such mobile technologies refer to handheld mobile devices such as smartphones, personal digital assistants and other portable computers. This chapter provides a summary of research and development in the field of mobile CSCL. We explore the synergies between CSCL approaches and mobile learning approaches. We will discuss the characteristics and affordances of mobile technologies, and contemporary mCSCL learning designs and practices, and postulate future trends and developments in mCSCL research.