Provided is a liquid storage bottle capable of suppressing a decrease in degree of internal pressure reduction with a simple configuration. The liquid storage bottle includes: a main body portion configured to store a liquid; a nozzle portion configured to discharge the liquid stored in the main body portion; a cap mounted on the nozzle portion; a space portion formed between the nozzle portion and the cap; and a communicating portion configured to allow the space portion to communicate with outside of the liquid storage bottle. The nozzle portion includes a contact portion which comes into contact with the cap in a state in which the cap is mounted on the nozzle portion, and the communicating portion is a groove portion formed by cutting out a part of the contact portion.