PSIJUS – Associação para a Intervenção Juspsicológica is a Portuguese socioprofessional, technical and scientific association founded in Lisbon in 2001. It supports the development and public understanding of forensic and criminal psychology, psychology of deviant behaviour, justice, criminology, education and social exclusion. Its work brings together students, professionals, researchers and practitioners, and includes international collaboration, research, publications, conferences and community intervention.

PSIJUS has organised international congresses, contributed to academic programmes and partnerships, and participated in prevention initiatives with municipalities and social organisations. It is represented in the Ibero-American Association of Legal Psychology and has taken part in international research and professional events. The association also promotes specialist knowledge through its Criminology and Social Education sections and technical-scientific council.

Beyond its professional and academic activities, PSIJUS has developed cultural projects, including the Centre for Arts and Psychology and Teatro A Maçã, which stages original plays. Its initiatives have also included student literary and photography competitions and financial support for students facing economic difficulties