A razor assembly, comprising: a guide housing (310, 510); a drive receiving member (330, 430, 530, 630) disposed on one side of the guide housing (310, 510) and configured to be movable in a first direction with respect to the guide housing (310, 510); a blade housing (320, 520, 620) disposed on another side of the guide housing (310, 510); at least one shaving blade (328, 528) having a cutting edge and disposed at the blade housing (320, 520, 620); a razor handle extending from the guide housing (310, 510); and a drive transmission member configured to transmit a driving force to the drive receiving member (330, 430, 530, 630), at least a portion of the drive transmission member disposed on one side of the razor handle (310, 510), wherein the blade housing (320, 520, 620) is configured to be moved with respect to the guide housing (310, 510) in a second direction that is not parallel to the first direction in response to movement of the drive receiving member (330, 430, 530, 630) in the first direction, and wherein the drive receiving member (330, 430, 530, 630) is further configured to be moved in the first direction with respect to the guide housing (310, 510) by the driving force transmitted from the drive transmission member, characterized in that one of the drive receiving member (330, 430, 530, 630) or the blade housing (320, 520, 620) includes a direction-switching rail (332, 432, 532, 626); another one of the drive receiving member (330, 430, 530, 630) or the blade housing (320, 520, 620), which does not include the direction-switching rail (332, 432, 532, 626), includes a guided member (326, 526, 632) that is movable along the direction-switching rail (332, 432, 532, 626); and at least a portion of the direction-switching rail (332, 432, 532, 626) comprises a region that is not parallel to the first direction. a guide housing (310, 510); a drive receiving member (330, 430, 530, 630) disposed on one side of the guide housing (310, 510) and configured to be movable in a first direction with respect to the guide housing (310, 510); a blade housing (320, 520, 620) disposed on another side of the guide housing (310, 510); at least one shaving blade (328, 528) having a cutting edge and disposed at the blade housing (320, 520, 620); a razor handle extending from the guide housing (310, 510); and a drive transmission member configured to transmit a driving force to the drive receiving member (330, 430, 530, 630), at least a portion of the drive transmission member disposed on one side of the razor handle (310, 510), wherein the blade housing (320, 520, 620) is configured to be moved with respect to the guide housing (310, 510) in a second direction that is not parallel to the first direction in response to movement of the drive receiving member (330, 430, 530, 630) in the first direction, and wherein the drive receiving member (330, 430, 530, 630) is further configured to be moved in the first direction with respect to the guide housing (310, 510) by the driving force transmitted from the drive transmission member, characterized in that one of the drive receiving member (330, 430, 530, 630) or the blade housing (320, 520, 620) includes a direction-switching rail (332, 432, 532, 626); another one of the drive receiving member (330, 430, 530, 630) or the blade housing (320, 520, 620), which does not include the direction-switching rail (332, 432, 532, 626), includes a guided member (326, 526, 632) that is movable along the direction-switching rail (332, 432, 532, 626); and at least a portion of the direction-switching rail (332, 432, 532, 626) comprises a region that is not parallel to the first direction.