Sample injection device

A sample injection device comprising:

• a syringe including, at a tip of the syringe, a needle configured to inject a sample into a sample introduction portion of a gas chromatograph;
• a syringe drive configured to move the syringe to the sample introduction portion;
• and
• a controller configured or programmed to control the syringe drive;
• wherein
• the needle is configured to penetrate a lid member configured to maintain airtightness of the sample introduction portion, the lid member being elastically deformable to allow the needle to penetrate therethrough;
• and
• the controller is configured or programmed to control the syringe drive such that in a first operation in which the syringe is moved to a side of the sample introduction portion and the needle penetrates the lid member, a moving speed from when a tip of the needle reaches a predetermined depth position of the lid member at which airtightness is maintained until when the tip of the needle penetrates the lid member is a first moving speed that is higher than a second moving speed, and at least a moving speed at a time when the tip of the needle contacts the lid member is a second moving speed that is lower than the first moving speed, and
• the controller is configured or programmed to control the syringe drive such that a moving speed in a second operation in which the needle that has entered an inside of the sample introduction portion by the first operation is moved to a direction opposite to a direction of the first operation and is removed from the lid member is higher than the first moving speed and the second moving speed.