This book constitutes the thoroughly refereed proceedings of the 7th Iberoamerican Workshop on Human-Computer Interaction, HCI-Collab 2021, held in Sao Paulo, Brazil, in September 2021. The 15 full and 4 short papers presented in this volume were carefully reviewed and selected from 68 submissions. The papers deal with topics such as emotional interfaces, usability, video games, computational thinking, collaborative systems, IoT, software engineering, ICT in education, augmented and mixed virtual reality for education, gamification, emotional Interfaces, adaptive instruction systems, accessibility, use of video games in education, artificial Intelligence in HCI, among others. The workshop was held virtually due to the COVID-19 pandemic.