The present invention relates to a protective cover for watermelon. The protective cover for watermelon of the present invention comprises: a support which is located at the lower part of watermelon and includes a seat part having a concave shape with multiple ventilation holes and being flat in order to put the watermelon thereon and a leg part extended towards the lower part of the seat part in order to support the seat part at a constant height from the ground a cover which includes a lid part forming a curved surface as an element for covering the upper side of the body of the watermelon, a flange part extended in the edge of the lid part, and a protrusion part protruding from the inner side of the lid part and maintaining a gap by being in contact with the surface of the watermelon and a unity means which includes a unity part equipped in the support to be symmetrical vertically, multiple fixture holes equipped in the flange part to be symmetrical vertically and an elastic string in which one end is connected to the multiple fixture holes and the other end is selectively unified with the unify part. The protective cover for watermelon of the present invention is conveniently used since the cover is able to be detached with a simple operation and is capable of sharply reduce working hours as compared to an existing operation using newspapers or rice straws and covering watermelon with the newspapers or rice straws. The present invention prevents the cover from being easily taken off and being easily moved and performs stable cover role since the elastic string is properly elongated when the volume of watermelon is increased without growth inhibition on the watermelon.COPYRIGHT KIPO 2014본 발명은 수박용 보호덮개를 개시한다.본 발명의 수박용 보호덮개는 수박의 하부에 위치되어 받쳐주는 것으로, 수박을 올려 놓도록 평탄하면서 다수의 통기홀이 형성된 오목한 형태를 갖는 시트부 및 이 시트부를 지면에서 일정 높이에 위치되게 지지하는 것으로 상기 시트부의 하면으로 연장되는 다리부로 이루어진 받침대와 수박의 몸통 상면을 가리도록 덮는 요소로 타원 곡면을 형성하는 뚜껑부 및 이 뚜껑부의 테두리에서 연장되는 플랜지부 및 상기 뚜껑부의 내면에 돌출 형성되는 것으로 끝단부가 수박의 외면에 접촉되어