A rectification structure body of a flying vehicle, the rectification structure body comprising: a rectification section having a rectification surface configured to rectify airflow from a travelling direction and a back surface opposite to the rectification surface; a heat input control section connected to the back surface and supporting the rectification section; and a vacuum thermal insulation section connected to the heat input control section and supporting the input control section such that the heat input control section is sandwiched between the back surface of the rectification section and the vacuum thermal insulation section, wherein the vacuum thermal insulation section comprises: a first plate forming a first surface of the vacuum thermal insulation section where the heat input control section is arranged, a second plate provided so as to face the first plate on an opposite side of the first plate, and a further plate (10c,10d,10e,10f) forming a side surface of the vacuum thermal insulation section connected to an end of the first surface, wherein the first plate, the second plate and the further plate (10c,10d,10e,10f) are formed of a rigid body, and wherein the heat input control section is arranged separated by a predetermined distance from the side surface such that heat added to the rectification section by the airflow moves to the heat input control section and further to the second plate via the first plate, ends of the first plate and the further plate (10c,10d,10e,10f). a rectification section having a rectification surface configured to rectify airflow from a travelling direction and a back surface opposite to the rectification surface; a heat input control section connected to the back surface and supporting the rectification section; and a vacuum thermal insulation section connected to the heat input control section and supporting the input control section such that the heat input control section is sandwiched between the back surface of the rectification section and the vacuum thermal insulation section, wherein the vacuum thermal insulation section comprises: a first plate forming a first surface of the vacuum thermal insulation section where the heat input control section is arranged, a second plate provided so as to face the first plate on an opposite side of the first plate, and a further plate (10c,10d,10e,10f) forming a side surface of the vacuum thermal insulation section connected to an end of the first surface, wherein the first plate, the second plate and the further plate (10c,10d,10e,10f) are formed of a rigid body, and wherein the heat input control section is arranged separated by a predetermined distance from the side surface such that heat added to the rectification section by the airflow moves to the heat input control section and further to the second plate via the first plate, ends of the first plate and the further plate (10c,10d,10e,10f). a first plate forming a first surface of the vacuum thermal insulation section where the heat input control section is arranged, a second plate provided so as to face the first plate on an opposite side of the first plate, and a further plate (10c,10d,10e,10f) forming a side surface of the vacuum thermal insulation section connected to an end of the first surface, wherein the first plate, the second plate and the further plate (10c,10d,10e,10f) are formed of a rigid body, and wherein the heat input control section is arranged separated by a predetermined distance from the side surface such that heat added to the rectification section by the airflow moves to the heat input control section and further to the second plate via the first plate, ends of the first plate and the further plate (10c,10d,10e,10f).