An environment controlled greenhouse comprising: a main body portion formed into an approximately arched shape with a plurality of flat surfaces; and a pair of wall portions, which are installed on respective ends in a longitudinal direction of the main body portion and are comprised of a plurality of flat surfaces that are sloped with respect to an installation surface, and wherein the greenhouse is characterized that the main body portion comprises: a top surface portion formed into a rectangular shape and disposed at the topmost portion; a pair of rectangular upper skirt surface portions connectedly installed to respective edges in a transverse direction of the top surface portion; and a pair of rectangular lower skirt surface portions connectedly installed to an edge in an installation direction of the respective upper skirt surface portions and disposed in a sloped manner with respect to the installation surface, wherein each of the wall portions comprises: a center wall surface portion connectedly installed to an edge in the longitudinal direction of the top surface portion; a pair of middle wall surface portions connectedly installed to respective edges in the transverse direction of the center wall surface portion and to an edge in the longitudinal direction of the upper skirt surface portion; and a pair of side wall surface portions connectedly installed to an edge in the transverse direction of the respective middle wall surface portions and to an edge in the longitudinal direction of the respective lower skirt surface portions, wherein the center wall surface portion comprises: a rectangular center upper wall surface portion connectedly installed to an edge in the longitudinal direction of the top surface portion; and a rectangular center lower wall surface portion connectedly installed to an edge in an installation direction of the rectangular center upper wall surface portion and disposed at an angle with respect to the center upper wall surface portion. a top surface portion formed into a rectangular shape and disposed at the topmost portion; a pair of rectangular upper skirt surface portions connectedly installed to respective edges in a transverse direction of the top surface portion; and a pair of rectangular lower skirt surface portions connectedly installed to an edge in an installation direction of the respective upper skirt surface portions and disposed in a sloped manner with respect to the installation surface, wherein each of the wall portions comprises: a center wall surface portion connectedly installed to an edge in the longitudinal direction of the top surface portion; a pair of middle wall surface portions connectedly installed to respective edges in the transverse direction of the center wall surface portion and to an edge in the longitudinal direction of the upper skirt surface portion; and a pair of side wall surface portions connectedly installed to an edge in the transverse direction of the respective middle wall surface portions and to an edge in the longitudinal direction of the respective lower skirt surface portions, a center wall surface portion connectedly installed to an edge in the longitudinal direction of the top surface portion; a pair of middle wall surface portions connectedly installed to respective edges in the transverse direction of the center wall surface portion and to an edge in the longitudinal direction of the upper skirt surface portion; and a pair of side wall surface portions connectedly installed to an edge in the transverse direction of the respective middle wall surface portions and to an edge in the longitudinal direction of the respective lower skirt surface portions, wherein the center wall surface portion comprises: a rectangular center upper wall surface portion connectedly installed to an edge in the longitudinal direction of the top surface portion; and a rectangular center lower wall surface portion connectedly installed to an edge in an installation direction of the rectangular center upper wall surface portion and disposed at an angle with respect to the center upper wall surface portion. a rectangular center upper wall surface portion connectedly installed to an edge in the longitudinal direction of the top surface portion; and a rectangular center lower wall surface portion connectedly installed to an edge in an installation direction of the rectangular center upper wall surface portion and disposed at an angle with respect to the center upper wall surface portion.