The present invention relates to a connection device of a ventilation window and a blocking net of a greenhouse, and, specifically, to a connection device (100) of a ventilation window and a blocking net of a greenhouse, in which a manual or automatic opening/closing device is connected to a rafter (10) and an opening/closing frame (20), which comprises a connection unit (110) including a rounding body (111) positioned in the center of the rafter (10) and having the central part projected upward a coupling unit (120) assembling the body (111) with a pair of fastening plates (121), and having a fixing groove (122) corresponding to the outer periphery of the body (111) formed between the pair of fastening plates (121) a pillar connection unit (130) combined with a connection part (131) inserted into the lower center of the coupling unit (120) and having an insertion groove (132) formed in the lower part of the connection part (131) and a net support unit (140) combined with rings (141) fastened to lower left and right sides of the coupling unit (120) and having an elastic strap (142) equipped on the rings (141). The connection device according to the present invention improves the efficiency of installation work by coupling a rafter of a greenhouse roof and an opening/closing frame with the connection device, has a cost saving effect as no separate rotary material for rotating the opening/closing frame is required, is able to protect crops from pesticides by installing a blocking net between the opening/closing frame and the greenhouse roof when the opening/closing frame is open for ventilation of the greenhouse, and is able to stably use the connection device as a pillar is able to be coupled.COPYRIGHT KIPO 2014본 발명은 온실 환기창 및 차단망 연결장치에 관한 것으로, 서까래(10)와 개폐프레임(20)에 수동 또는 자동의 개폐장치(30)가 연결된 온실의 온실 환기창 및 차단망 연결장치(100)에 있어서, 서까래(10)의 중심에 위치하되, 중앙부분이 상측으로 융기되어 라운딩된 몸체(111)를 포함하는 연결부(110)와, 몸체(111)를 한쌍의 체결플레이트(121)로 조립하되, 한쌍의 체결플레이트(121) 사이에 상기 몸체(111)의 외주연에 일치하는 고정홈(122)을 형
