Channel structure, fluid measurement apparatus, and fluid control apparatus

A channel structure comprising:

• pipe members each forming a channel through which a fluid flows;
• a fluidic resistor member that is made of ceramic, that is provided to the channel, and that has one or more resistor channels;
• a fixing mechanism that fixes the fluidic resistor member to the channel by being nipped between the pipe members, wherein
• the fixing mechanism includes:
• a seal made of an elastic material that provides sealing on an outer peripheral surface of the fluidic resistor member;
• a gasket that has an annular shape, that is provided on the outer peripheral surface of the fluidic resistor member, and that is nipped between the pipe members;
• a fixing member that has a tubular shape, and that is provided on an outer peripheral surface of the fluidic resistor member on one side or the other side of the gasket;
• an intermediate support portion that has a tubular shape, and that is provided between the outer peripheral surface of the fluidic resistor member and an inner peripheral surface of the fixing member;
• and
• a press-fixing portion that fixes the fluidic resistor member by pressing the outer peripheral surface of the fluidic resistor member, wherein
• the seal and the press-fixing portion are provided at positions different from each other in an axial direction of the fluidic resistor member, and
• the intermediate support portion extends outward from an end face of the fixing member, on an opposite side of an end face that is in contact with the gasket.