A helicopter skid landing gear comprising: two longitudinal skid tubes for contact with the ground; a front cross tube interconnecting the two skid tubes; and a rear cross tube interconnecting the two skid tubes, at least one of the cross tubes (24,26) including: a monolithic metallic tube having a central portion extending transversely between two end portions with longitudinal central axes of the central portion and of the end portions (A C, A E) being located in a same plane, with at least part of the central portion having a cross-section defining first and second axes with the first axis, the second axis and the longitudinal axis (A C) of the central portion extending perpendicularly to each other and intersecting at a common point, one of the first and second axes (32, 34) extending along a minimum outer cross-sectional dimension of the central portion, the second axis extending at a smaller angle (θ) with respect to the plane than the first axis; and at least part of each end portion having a cross-section defining third and fourth axes with the third axis, the fourth axis and the longitudinal axis (A E) of the end portion extending perpendicularly to each other and intersecting at a common point, one of the third and fourth axes (36, 38) extending along a minimum outer cross-sectional dimension of the end portion, the fourth axis extending at a smaller angle (α) with respect to the plane than the third axis; wherein the cross-section of the central portion has inner and outer heights (H ci, H co) defined along the second axis and the cross-section of the end portions each have inner and outer heights (H ei, H eo) defined along the fourth axis, characterized in that the inner and outer heights of one of the central portion and the end portion are respectively greater than the inner and outer heights of the other of the central portion and the end portion. two longitudinal skid tubes for contact with the ground; a front cross tube interconnecting the two skid tubes; and a rear cross tube interconnecting the two skid tubes, at least one of the cross tubes (24,26) including: a monolithic metallic tube having a central portion extending transversely between two end portions with longitudinal central axes of the central portion and of the end portions (A C, A E) being located in a same plane, with at least part of the central portion having a cross-section defining first and second axes with the first axis, the second axis and the longitudinal axis (A C) of the central portion extending perpendicularly to each other and intersecting at a common point, one of the first and second axes (32, 34) extending along a minimum outer cross-sectional dimension of the central portion, the second axis extending at a smaller angle (θ) with respect to the plane than the first axis; and at least part of each end portion having a cross-section defining third and fourth axes with the third axis, the fourth axis and the longitudinal axis (A E) of the end portion extending perpendicularly to each other and intersecting at a common point, one of the third and fourth axes (36, 38) extending along a minimum outer cross-sectional dimension of the end portion, the fourth axis extending at a smaller angle (α) with respect to the plane than the third axis; wherein the cross-section of the central portion has inner and outer heights (H ci, H co) defined along the second axis and the cross-section of the end portions each have inner and outer heights (H ei, H eo) defined along the fourth axis, characterized in that the inner and outer heights of one of the central portion and the end portion are respectively greater than the inner and outer heights of the other of the central portion and the end portion. a monolithic metallic tube having a central portion extending transversely between two end portions with longitudinal central axes of the central portion and of the end portions (A C, A E) being located in a same plane, with at least part of the central portion having a cross-section defining first and second axes with the first axis, the second axis and the longitudinal axis (A C) of the central portion extending perpendicularly to each other and intersecting at a common point, one of the first and second axes (32, 34) extending along a minimum outer cross-sectional dimension of the central portion, the second axis extending at a smaller angle (θ) with respect to the plane than the first axis; and at least part of each end portion having a cross-section defining third and fourth axes with the third axis, the fourth axis and the longitudinal axis (A E) of the end portion extending perpendicularly to each other and intersecting at a common point, one of the third and fourth axes (36, 38) extending along a minimum outer cross-sectional dimension of the end portion, the fourth axis extending at a smaller angle (α) with respect to the plane than the third axis; wherein the cross-section of the central portion has inner and outer heights (H ci, H co) defined along the second axis and the cross-section of the end portions each have inner and outer heights (H ei, H eo) defined along the fourth axis, characterized in that the inner and outer heights of one of the central portion and the end portion are respectively greater than the inner and outer heights of the other of the central portion and the end portion.