A structure of an engine room includes an FEM (front end module) disposed at a front side, a dash panel disposed at a rear side, and housing panels disposed at both lateral sides between the FEM and the dash panel, respectively. The structure may include a housing member including a transverse portion which is disposed to be substantially parallel to the dash panel, and longitudinal portions which are bent forward from both ends of the horizontal portion, respectively, and disposed side-by-side with the corresponding housing panels. The housing member is formed with an open interior.