An engine mount supporting structure comprising: a front side frame extending longitudinally of a vehicular body; an upper member disposed laterally outwardly of the front side frame and extending rearwardly of the vehicular body, the upper member being upward convexly curved; an engine mount attached to the front side frame and disposed between the front side frame and the upper member; and an attachment bracket attached to the upper member; wherein the engine mount includes an engine mount body; a top support supporting a top portion of the engine mount body and supported by the attachment bracket; a bottom front support supporting a bottom front portion of the engine mount body; and a bottom rear support supporting a bottom rear portion of the engine mount body; wherein the front side frame includes a front coupled portion and a rear coupled portion arranged longitudinally of the vehicular body, the front coupled portion being attached to the bottom front support of the engine mount, the rear coupled portion being attached to the bottom rear support of the engine mount, and wherein the attachment bracket has a V-shape including a front attached portion attached to a front coupled section of the upper member, a rear attached portion attached to a rear coupled section of the upper member, and an inner attached portion attached to the top support of the engine mount. a front side frame extending longitudinally of a vehicular body; an upper member disposed laterally outwardly of the front side frame and extending rearwardly of the vehicular body, the upper member being upward convexly curved; an engine mount attached to the front side frame and disposed between the front side frame and the upper member; and an attachment bracket attached to the upper member; wherein the engine mount includes an engine mount body; a top support supporting a top portion of the engine mount body and supported by the attachment bracket; a bottom front support supporting a bottom front portion of the engine mount body; and a bottom rear support supporting a bottom rear portion of the engine mount body; wherein the front side frame includes a front coupled portion and a rear coupled portion arranged longitudinally of the vehicular body, the front coupled portion being attached to the bottom front support of the engine mount, the rear coupled portion being attached to the bottom rear support of the engine mount, and wherein the attachment bracket has a V-shape including a front attached portion attached to a front coupled section of the upper member, a rear attached portion attached to a rear coupled section of the upper member, and an inner attached portion attached to the top support of the engine mount. an engine mount body; a top support supporting a top portion of the engine mount body and supported by the attachment bracket; a bottom front support supporting a bottom front portion of the engine mount body; and a bottom rear support supporting a bottom rear portion of the engine mount body; wherein the front side frame includes a front coupled portion and a rear coupled portion arranged longitudinally of the vehicular body, the front coupled portion being attached to the bottom front support of the engine mount, the rear coupled portion being attached to the bottom rear support of the engine mount, and wherein the attachment bracket has a V-shape including a front attached portion attached to a front coupled section of the upper member, a rear attached portion attached to a rear coupled section of the upper member, and an inner attached portion attached to the top support of the engine mount.