PROBLEM TO BE SOLVED: To provide a technology relating to a liquid injection device injecting a liquid.SOLUTION: A liquid injection device injecting a liquid, includes an injection pipe for injecting the liquid, a liquid supply flow channel for supplying the liquid, a pulsation generating portion applying pulsation to the liquid supplied from the liquid supply flow channel to supply the same to the injection pipe, a container accommodating at least a part of the injection pipe, at least a part of the liquid supply flow channel, and the pulsation generating portion, and including the injection pipe at a first end portion, and a plurality of linear members including the liquid supply flow channel at a second end portion, and a vertical regulating portion for regulating a vertical direction of the container. At the second end portion of the container, a first linear member among the plurality of linear members, is disposed above a second linear member with respect to the vertical direction, and a weight of the first linear member is less than that of the second linear member.
