Presepsin is a 13-kDa protein that is a fragment of CD14 with truncated N-terminal, the receptor for lipopolysaccharide (LPS)/LPS-binding protein complexes. It is a novel marker being sought in many diseases such as sepsis, kidney failure, disseminated intravascular coagulation, etc. In this review, we aimed to clarify its utility in critical diseases and availability in critical care settings such as emergency departments and intensive care units.