Sliding window or improved sliding door and glazing bead supports applied thereby

A sliding window or sliding door with a leaf, the leaf comprises a leaf frame that is composed of leaf profiles wherein a panel is mounted, whereby each leaf profile comprises two half-shells which are thermally connected to each other by an intermediate thermal insulator, whereby the leaf frame contains a rebate and one or more glazing bead supports which support the panel in the rebate and whereby the leaf frame is supported by one or more roller cassettes with rollers, wherein the one or more glazing bead supports are separate from the roller cassettes, wherein the at least one glazing bead support comprises a feed-through section for transmitting a weight of the panel or a part thereof to at least one concerned roller cassette and that the feed-through section extends through a bottom leaf profile of the leaf frame up to the at least one concerned roller cassette,

• wherein the thermal insulator includes a passage, and
• wherein the feed-through section is formed by at least one protrusion which extends a certain length within the passage in the thermal insulator.