A control method of a liquid ejection head, in which the liquid ejection head having first and second heat generating resistors that generate thermal energy for ejecting liquid, includes first covering portion covers the first heat generating resistor. A second covering portion is electrically connected to the first covering portion and covering the second heat generating resistor. An insulating layer is provided between the first heat generating resistor and the first covering portion and between the second heat generating resistor and the second covering portion. Surface potentials are set of the first and second covering portions to be equal to or less than a ground potential in a state where drive voltage is not applied to the first and second heat generating resistors, is accomplished in accordance with application of drive voltage to at least either the first heat generating resistor or the second heat generating resistor.