Auto-sampler for chromatographs

An auto-sampler for chromatographs configured to inject sample into an analysis channel for chromatography, comprising:

• a needle for sampling configured to move while a tip end thereof faces vertically downward;
• an injection port provided as a member separate from the switching valve;
• and
• a pipe that fluidically connects one port of the switching valve with the injecting port, wherein
• the injection port includes an opening at an upper surface thereof through which a tip end of the needle is inserted to make the needle fluidically communicate with the pipe, and a needle seal configured to get into contact with an outer circumferential surface of the tip end portion to make the needle fluidically communicate with the pipe in a liquid-tight manner when the tip end of the needle is inserted through the opening,
• the pipe has an end surface close to the injecting port facing vertically upward, and a broad member is fixed to an end portion of the pipe close to the injecting port, and the end surface of the pipe appears on an upper surface of the broad member,
• the injecting port includes a housing having a recess that accommodates the broad member, fixed to the end portion of the pipe, with the broad member being fitted into the recess from above, and a cap attached to the housing and having a through hole defining the opening, and
• the needle seal is disposed on the upper surface of the broad member that is fitted in the recess of the housing, and is pressed against the end surface of the pipe by the cap that is attached to the housing.