Descriptive: A 24-month multicentre, observational, prospective cohort study. Population: IBD Patients under stable clinical and biological remission Study treatments: Patients who will be proposed to switch, or who have just switched, from the intravenous originator Remicade® or one of its biosimilars to the subcutaneous infliximab Remsima®SC as part of routine care. All consecutive patients in IBD centers participating in the study will be proposed to participate in the study during their regular outpatients' visits.||Objectives:The primary objective of PEREM study is to determine the rate of persistence of subcutaneous infliximab at 48 weeks after switching from IV infliximab to subcutaneous infliximab Remsima®SC.