Living Labs (LL) has recently attracted attention as a co-creative service design method that involves users. To make LL successful, it is important for practitioners to use not only knowledge on design methods, but also knowledge on “facilitating long-term co-creation with users”. This knowledge can be regarded as a type of the procedural knowledge, which is generally called “know-how”. However, such LL know-how is not shared and utilized among practitioners, since it is often buried in their experiences. We propose a method that combines a card tool and workshop to elicit the LL know-how and share them among practitioners. We tested the developed cards and workshop to 32 LL practitioner, and conducted questionnaires and interviews for the evaluation. Our findings indicate that the proposed cards work as triggers to elicit various LL know-how, and the workshop supports to share practice-based concrete and contextual knowledge, which are useful for practitioners