A useful paper offering a broad review of past literature on the concept of infrastructuring and reflects its use in Participatory Design (PD) with a conceptual interest. This paper should be read in conjuction with Hillgren et al’s paper on infrastructuring in design and social innovation. It starts with the notion of information infrastructure introduced to the PD community in the mid-1990s by Star and collaborators. It traces how the notion has been adapted, appended, and negotiated within a number of PD approaches known as “infrastructuring.” Based on this review, the paper discusses a number of themes arising from these approaches that relate to salient information infrastructure characteristics and speak to the specificity of infrastructuring in PD. This paper takes stock of what has happened in conceptual terms with regard to information infrastructure and infrastructuring in the field of PD to inform continuing work.