The 4th IAA Conference on University Satellite Missions and CubeSat Workshop took place on 04-07 December 2017 in Roma, Italy. The event, organized by GAUSS Srl under the aegis of the International Academy of Astronautics (IAA), gathered many participants from all around the world belonging to the Space academic, scientific and industry domains. During this forum, high level speakers have presented scientific and technical Papers on the Microsatellites related field, sharing their knowledge on the several aspects of the small satellite missions and the CubeSats community. IAA Secretary General Dr. Jean-Michel Contant – member of the Program Committee – gave the Opening Lecture and co-chaired the Conference with Professor Filippo Graziani (GAUSS President and IAA member) and other experts. The program was organized into Invited Lectures and Technical Sessions structured according to the following Topics: Launch Opportunities, Payload, Space Mission Analysis and Design, Attitude Control, Space Debris, PoquetCubes, CubeSats Subsystems and New Perspectives. An IAA Regional Meeting and Guided Tours were also organized during the Conference days.