PROBLEM TO BE SOLVED: To provide a unit to be used for constructing an agricultural/gardening greenhouse, capable of widening the width and depth of a greenhouse at a prescribed unit when constructing an agricultural/gardening greenhouse, and holding the inclination of a roof part at a prescribed angle. SOLUTION: This unit for an agricultural/gardening house is composed of a support, a sliding body movable along the support, a roof material attaching arm whose one end is rotatably attached to the sliding body, and a supporting material which rotatably supports the roof material attaching arm and whose one end is rotatably attached to the support. The sliding body is latched to hold the inclination of the roof material attaching arm at a prescribed angle by arranging two latch sticks having void tooth form-shaped parts on the upper and lower sides and engaging the void tooth form-shaped parts with each other. COPYRIGHT: (C)2008,JPO&INPIT