Liquid ejection apparatus and control method of liquid ejection apparatus

A control method of a liquid ejection apparatus comprising a liquid ejection unit having an ejection opening surface with an ejection opening for ejecting liquid formed thereon, a cap member contacting the ejection opening surface and covering the ejection opening surface, and a drive motor configured to cause the liquid ejection unit and the cap member to contact or separate from each other, the method comprising:

• a negative pressure generation process of driving a negative pressure generation unit configured to bring a space surrounded by the ejection opening surface and the cap member into a negative pressure state, under a separation instruction to separate the cap member and the liquid ejection unit, and
• a driving process of driving the drive motor to separate the liquid ejection unit and the cap member, after the space has been brought into a negative pressure state by the negative pressure generation process.