Mattress Extender and Health Care Bed Repositioning System

A mattress extender (10) for a health care bed repositioning system (2) of a health care bed (12) is disclosed. The mattress extender (10) comprises (6): - a housing (30) having two opposing side portions (31, 31’) and a rear side provided with an elongated opening (32) arranged and configured to receive a sheet (14) of the health care bed (12), - a rotatably mounted roller (34) extending between the two opposing side portions (31, 31’), wherein the roller (34) is provided with a repositioning device (8) comprising a motor (50) arranged and configured to rotate the roller (34) and hereby move the sheet (14). The two opposing side portions (31, 31’) are made from a soft material (6).