A scroll fluid machine comprising: a first scroll member provided with a spiral first wall on a first end plate; and a second scroll member that is provided with a spiral second wall on a second end plate disposed so as to face the first end plate, and that relatively revolves by engagement between the second wall and the first wall, the scroll fluid machine comprising: an inclined section (3a1, 5a1) that continuously reduces an inter-facing-surface distance between the first end plate and the second end plate facing each other, from an outer circumferential side toward an inner circumferential side of each of the first wall and the second wall; characterised in that it further comprises a wall flat section (3b2, 3b3, 5b2, 5b3) provided in an outermost circumferential part and/or an innermost circumferential part of each of the first wall and the second wall, and having no change in height; and an end plate flat section (3a2, 3a3, 5a2, 5a3) provided in each of the first end plate and the second end plate, and corresponding to the wall flat section, wherein each of the inclined sections (3a1, 5a1) is provided over a range of 180° or more around a spiral center and has an inclination angle of 0.2° or more and 4° or less, and a tooth tip of a wall inclined connecting section (3b4, 3b5) that connects the inclined section and the wall flat section, and/or a tooth bottom of an end plate inclined connecting section (3a4, 3a5) that connects the inclined section and the end plate flat section has an inclination moderation shape formed by moderating and connecting an inclination extending from the flat section to the inclined section. a first scroll member provided with a spiral first wall on a first end plate; and a second scroll member that is provided with a spiral second wall on a second end plate disposed so as to face the first end plate, and that relatively revolves by engagement between the second wall and the first wall, the scroll fluid machine comprising: an inclined section (3a1, 5a1) that continuously reduces an inter-facing-surface distance between the first end plate and the second end plate facing each other, from an outer circumferential side toward an inner circumferential side of each of the first wall and the second wall; characterised in that it further comprises a wall flat section (3b2, 3b3, 5b2, 5b3) provided in an outermost circumferential part and/or an innermost circumferential part of each of the first wall and the second wall, and having no change in height; and an end plate flat section (3a2, 3a3, 5a2, 5a3) provided in each of the first end plate and the second end plate, and corresponding to the wall flat section, wherein each of the inclined sections (3a1, 5a1) is provided over a range of 180° or more around a spiral center and has an inclination angle of 0.2° or more and 4° or less, and a tooth tip of a wall inclined connecting section (3b4, 3b5) that connects the inclined section and the wall flat section, and/or a tooth bottom of an end plate inclined connecting section (3a4, 3a5) that connects the inclined section and the end plate flat section has an inclination moderation shape formed by moderating and connecting an inclination extending from the flat section to the inclined section. an inclined section (3a1, 5a1) that continuously reduces an inter-facing-surface distance between the first end plate and the second end plate facing each other, from an outer circumferential side toward an inner circumferential side of each of the first wall and the second wall; characterised in that it further comprises a wall flat section (3b2, 3b3, 5b2, 5b3) provided in an outermost circumferential part and/or an innermost circumferential part of each of the first wall and the second wall, and having no change in height; and an end plate flat section (3a2, 3a3, 5a2, 5a3) provided in each of the first end plate and the second end plate, and corresponding to the wall flat section, wherein each of the inclined sections (3a1, 5a1) is provided over a range of 180° or more around a spiral center and has an inclination angle of 0.2° or more and 4° or less, and a tooth tip of a wall inclined connecting section (3b4, 3b5) that connects the inclined section and the wall flat section, and/or a tooth bottom of an end plate inclined connecting section (3a4, 3a5) that connects the inclined section and the end plate flat section has an inclination moderation shape formed by moderating and connecting an inclination extending from the flat section to the inclined section.