UD卡车，是沃尔沃集团旗下的日本货车制造公司。

Nissan Diesel业务在1935年开始，当时名称为“日本デイーゼル工业株式会社”，初时是出产柴油发动机。公司于1942年更名“钟渊デイーゼル工业”；1946年更名“民生产业”。

UD Trucks Corporation (UDトラックス株式会社, UD Torakkusu Kabushikigaisha) is a Japanese company whose principal business is the manufacture and sales of light, medium and heavy duty diesel trucks, buses, bus chassis and special-purpose vehicles. Its headquarters is located in Ageo, Saitama, Japan. The company is owned 100% by the Volvo Group since 2007. Until 2010, it was known as Nissan Diesel, the company changed its name to UD Trucks. Already before the name change, the UD name was prominently displayed to separate the identity from that of their former owner Nissan Motors.