A liquid container includes: a container main body which stores a liquid; an ultrasonic sensor which is disposed so as to contact an outer side wall of the container main body and so as to emit an ultrasonic wave into the liquid; and a reflecting means which is disposed at an inner bottom portion of the container main body and reflects the ultrasonic wave emitted into the liquid from the ultrasonic sensor towards a surface of the liquid, the reflecting means being disposed at a position where a distance the ultrasonic wave travels through the liquid in a path of the ultrasonic wave from the ultrasonic sensor to a reflecting surface of the reflecting means, is greater than a distance at which an insensitive band of the ultrasonic sensor is obtained.