This document presents the report of the 1st e-ROSA Stakeholder Workshop “Community building and mapping of the research infrastructures for agro-food research” that was held on 6-7 July 2017 at Montpellier SupAgro. The goal of this workshop was to bring together scientific communities and existing data-related infrastructures and initiatives that can support researchers throughout the data life cycle in the context of their research activities. It gathered various stakeholders such as IT specialists, Knowledge managers, semantic experts and researchers from disciplinary fields related to the agri-food domain. In particular, the workshop sought to: Initiate a community building process around the issue of Open & Big Data in agri-food; Improve our knowledge on the current landscape of existing research infrastructures and e-infrastructures, networks, initiatives and policies; Justify the need for a common e-infrastructure in agri-food by identifying gaps and key collaboration actions to implement; Link the envisioned e-infrastructure for agri-food with the EOSC vision and architecture; Prepare for the next e-ROSA Stakeholder Workshops during which we will elaborate our vision for the future and identify related needs (2nd workshop), and develop a common roadmap on how we can achieve this vision (3rd workshop). It was organised around three main parallel sessions: 1) FAIRifying data, 2) Data repositories and discovery services, and 3) E-infrastructures and data services. The workshop in itself corresponds to the Deliverable 3.1 under Work Package 3 “Roadmap co-Design & Uptake”. e-ROSA Stakeholder Workshops consist in a collaborative mechanism that allows to bring together the e-ROSA Stakeholder Community in view of envisioning the future e-infrastructure for Open Science in agri-food and co-elaborating the common roadmap that will support the implementation of this e-infrastructure.