Patent ID: 8104516

Claim:
A gas supply unit comprising: an input block connected to operation gas supply source to input operation gas; an output block outputting the operation gas to an operation gas supply destination; a first fluid control device and a second fluid control device controlling the operation gas; a third fluid control device controlling the operation gas, being arranged in a conveyance direction conveying the operation gas from the input block to the output block; a first flow path block having a side surface on which the first fluid control device is attached; and a second flow path block having a side surface on which the second fluid control device is attached, wherein the first flow path block and the second flow path block are stacked one on top of the other in a direction perpendicular to the conveyance direction conveying the operation gas from the input block to the output block, and the first fluid control device and the second fluid control device are arranged between the third fluid control devices and an installation surface on which the gas supply unit is to be installed, the first flow path block is formed with at least one port each on a top surface and a bottom surface, the ports communicating with each other via the first fluid control device, and the second flow path block is formed with at least one port each on a top surface and a side surface opposite a side surface to which the second fluid control device is attached, the ports communicating with each other via the second fluid control device.