The multipurpose ICARUS detector, with its large sensitive volume, high granularity, excellent tracking and particle identification capabilities, is an ideal device for searching for phenomena beyond the Standard Model. A vast physics program, including accelerator (CNGS neutrino beam), and non-accelerator (supernova, atmospheric, and nucleon decay) physics, planned for the ICARUS detector, is reviewed.

PACS numbers: 14.60Pq, 13.15+g