毕克斯·拜德贝克（英语：Bix Beiderbecke，1903年3月10日－1931年8月6日），又译毕德贝克、贝德贝克，全名里昂·俾斯麦·拜德贝克（Leon Bismark Beiderbecke），美国爵士短号手、爵士钢琴家和作曲家。

他和路易斯·阿姆斯壮是1920年代乐坛上，数一数二、最具影响力的爵士独奏家。他的作品中，尤以〈Singin' the Blues〉（1927年）和〈I'm Coming, Virginia〉（1927年）最为众所赞叹，淋漓尽致地展现了他异常纯粹的音色和即兴天分。也由于这二首乐曲，他协助创立了爵士谣曲风格，进而促成1950年代冷爵士乐的兴起。他为数极少的钢琴乐曲作品中，唯一留下录音记录的〈In a Mist〉（1927年）则开创性的融合古典元素与爵士切分音风格。拜德贝克启发了众多爵士后辈，如平·克劳斯贝，也经由法兰克·楚鲍尔间接影响了莱斯特·杨。

Leon Bismark "Bix" Beiderbecke (March 10, 1903 – August 6, 1931) was an American jazz cornetist, jazz pianist, and composer.

With Louis Armstrong and Muggsy Spanier, Beiderbecke was one of the most influential jazz soloists of the 1920s. His turns on "Singin' the Blues" and "I'm Coming, Virginia" (both 1927), in particular, demonstrated an unusual purity of tone and a gift for improvisation. With these two recordings, especially, he helped to invent the jazz ballad style and hinted at what, in the 1950s, would become cool jazz. "In a Mist" (1927), one of a handful of his piano compositions and one of only two he recorded, mixed classical (Impressionist) influences with jazz syncopation.