A vehicle door, comprising: - a mount comprising a lower part and an upper frame defining an opening, this upper frame comprising two ascending posts (12a, 12b) connected by an upper rail, - an encapsulated fixed window module, said module having a general P-shape and comprising a fixed window mounted in a part of said opening, and an ascending profile extending along an ascending edge of the fixed window and extending from the opening to the lower part of the mount, - a movable window capable of closing the remainder of said opening, this window comprising two ascending edges (14a, 14b) along which guides (25, 26) are fixed, - a sliding joint having a general U-shape and comprising two ascending strands (30a, 30b) connected by an upper strand, the ascending strands having a general C-shape in cross-section and each comprising a longitudinal recess for receiving and guiding one of said guides, a first of the ascending strands extending along a first of the ascending posts, and a second of the ascending strands extending along said ascending profile, the fixed and movable windows comprising outer surfaces (14d, 22d) which are aligned with each other as well as with an outer surface of a first trim attached to the first ascending strand and fixed to said first ascending strand, and an outer surface of a second trim attached to the second ascending strand and fixed to said ascending profile, said ascending profile comprises a body made of rigid plastic and an overmolded coating which is configured to fix the plastic body to the fixed window, said body comprises an ascending slot for receiving a tab of said second trim, said slot extends in a plane substantially perpendicular to said fixed window and comprises a first side wall substantially aligned with said ascending edge or a portion (27b2) of said overmolded coating. - a mount comprising a lower part and an upper frame defining an opening, this upper frame comprising two ascending posts (12a, 12b) connected by an upper rail, - an encapsulated fixed window module, said module having a general P-shape and comprising a fixed window mounted in a part of said opening, and an ascending profile extending along an ascending edge of the fixed window and extending from the opening to the lower part of the mount, - a movable window capable of closing the remainder of said opening, this window comprising two ascending edges (14a, 14b) along which guides (25, 26) are fixed, - a sliding joint having a general U-shape and comprising two ascending strands (30a, 30b) connected by an upper strand, the ascending strands having a general C-shape in cross-section and each comprising a longitudinal recess for receiving and guiding one of said guides, a first of the ascending strands extending along a first of the ascending posts, and a second of the ascending strands extending along said ascending profile, the fixed and movable windows comprising outer surfaces (14d, 22d) which are aligned with each other as well as with an outer surface of a first trim attached to the first ascending strand and fixed to said first ascending strand, and an outer surface of a second trim attached to the second ascending strand and fixed to said ascending profile, said ascending profile comprises a body made of rigid plastic and an overmolded coating which is configured to fix the plastic body to the fixed window, said body comprises an ascending slot for receiving a tab of said second trim, said slot extends in a plane substantially perpendicular to said fixed window and comprises a first side wall substantially aligned with said ascending edge or a portion (27b2) of said overmolded coating.