Abstract: The invention concerns agriculture. It relates in particular to an agricultural greenhouse which comprises a metallic frame supporting transparent covering elements, wherein said covering elements are formed of panels made of transparent plastic material mounted flatwise and having undulations which are parallel to the metallic frame members, said undulations each having two asymmetrical slopes, with the greater slope being directed southward, the angle .alpha. between the greater slope and the horizontal being about 25.degree. to 35.degree., and the angle .beta. between the smaller slope of each undulation and the horizontal being about 55.degree. to 65.degree., and at least one of said covering elements being mounted pivotally around a horizontal axis at its free edge directed southward, with control means being provided for causing said panel or panels of the movable covering to pivot at a predetermined angle.