PROBLEM TO BE SOLVED: To provide a multi-span vinyl house, panel member, and snow-melting apparatus, which allow snow accumulated on a roof surface to be melted effectively even with a warm air-generating apparatus having a relatively small calorific value.SOLUTION: According to the present invention, the multi-span vinyl house comprises a panel member 20 placed on a roof surface 10A. The panel member 20 comprises a frame 21 having a constant thickness, a transparent film 22 doubly stretched on the frame 21, and a crosspiece 23, and is divided into a plurality of panels 24 by the crosspiece 23. Each of the plurality of panels 24 has a space 25 that serves as an air heat-insulating layer formed between the doubled transparent films 22. On a valley gutter-side panel 24A, which is closest to a valley gutter 17, among the plurality of panels 24, there are provided a valley gutter-side air-introducing portion 26A for introducing warm air generated by a warm air-producing device 30 into a valley gutter-side space 25A of the valley gutter-side panel 24A and a valley gutter-discharging portion 27A discharging warm air from the valley gutter-side space 25A.SELECTED DRAWING: Figure 2【課題】比較的発熱量の小さい温風生成装置であっても屋根面に積もった雪を効果的に融雪することができる、連棟ビニールハウス、パネル部材、及び融雪装置を提供すること。【解決手段】屋根面１０Ａに設置されたパネル部材２０を備え、パネル部材２０は、一定の厚みのあるフレーム２１と、フレーム２１に二重に展張された透明フィルム２２と、桟２３とを有し、桟２３によって複数のパネル２４に区分されており、複数のパネル２４は、二重の透明フィルム２２の間に形成された空気断熱層となる空間２５をそれぞれ有し、複数のパネル２４のうち谷樋１７に最も近い谷樋側パネル２４Ａには、温風生成装置３０によって生成された温風を谷樋側パネル２４Ａの谷樋側空間２５Ａに導入する谷樋側導風部２６Ａと、谷樋側空間２５Ａの温風を排出する谷樋側排風部２７Ａが設けられている。【選択図】 図２
