The present invention relates to a roof structure for a greenhouse using a zero bar system for effectively preventing internal heat flow and rainwater inflow through ventilation openings and window sill when the roof window is closed as well as internal and external heat conduction through roof openings and roof openings of roofs and roofs .The roof of the greenhouse using the zero bar system according to the present invention includes a roof rafter 10 having an inner bar 11 and an outer bar 12, a body 21 and inner and outer binding pieces 22 A sealing member 30 having a binding portion 31 and a suction portion 32 and a sealing portion 31 and a sealing portion 32 An upper frame member 50 having a sealing member 30 , two coverings 40, a main bar 51, a fixing bar 52 and a supporting bar 53, and a main bar 51 A lower frame member 50 having a fixing bar 52 and a supporting bar 53 , and a lower frame member 50 having a lower frame member 61 , a hinge bar 62, a receiving bar 63, a lower bar 64 A dormer window 60 having a lower chisel 65, a support bar 63 , a left and a right turn bar 66 and 66, a drive motor 71, a drive shaft 72, a pinion 73, (70) having the gear teeth (74), and the gear teeth are stably meshed with the pinion, and the rack is reciprocally moved inward and outward stably according to the forward and reverse rotation of the pinion, thereby opening and closing the dormer window And a guide member (80) for supporting the pinion and the rack.본 발명은, 지붕 및 지붕의 환기구와 지붕창을 통한 내·외의 열전도는 물론 지붕창을 닫았을 때 환기구와 지붕창을 통한 내부의 열 유출과 빗물 등의 유입이 효과적으로 방지되도록 하는 제로바시스템을 이용한 온실지붕에 관한 것이다.이와 같은 본 발명에 따른 제로바시스템을 이용한 온실지붕은, 내측바(11)와 외측바(12)를 구비하는 지붕서까래(10)와, 몸체(21)와 내·외측 결속편(22)(22)을 구비는 단열부재(20)와, 결착부(31)와 흡착부(32)를 구비하는 밀폐부재(30)와, 결착부(31)와 밀폐부(32)를 구비하는 밀폐부재(30)와, 2장의 피복재(40)와, 메인바(51)·고정바(52)·지지바(53)를 구비하는 상부창틀부재(50)와, 메인바(51)·고정바(52)·지지바(53)를 구비하는 하부창틀부재(50)와, 상틀바(61)·힌지바(62)·받침바(63)·하틀바(64)·하틀지지바(65)·받침바(63)·좌·우틀바(66)(66)를 구비하는 지붕창(60), 구동모터(71)·구동축(72)·피니언(73)·랙(74)을 구비는 개폐수단(70)
