The developed and implemented pilot sample of a heat-driven hydrogen compressor for deep argon purification at the association Lviv Chemical Plant (Lviv, Ukraine) has been described. Initial data for work implementation were the previously obtained R&D results on the investigations of thermo-sorption hydrogen interaction with metal hydrides, as well as the author's experience in the field of the development and implementation of metal-hydride compressing technique. The compressor consists of dual-linked two-stage compressing cascades, including generator-sorbers filled with correspondingly 'high' and 'low-temperature' hydride-forming materials of intermetallide LaNi5 doped by different quantities of manganese. Additionally, the compressor includes a gas-distributing line with locking and measuring elements, as well as the air-cooling system and control unit.