Liquid injection apparatus

A liquid injection apparatus (10) comprises an injection device (15), and an electro-magnetic injection valve (14) for ejecting pressurized fuel into the injection device. An ejection hole in the electro-magnetic injection valve is connected to a hollow cylindrical hermetically sealed space, which in turn is connected to a liquid ejection nozzle, through a liquid filling port, a liquid supply passage, and a chamber which are included in the injection device. By means of allowing the electro-magnetic injection valve to eject the pressurized fuel at an angle of inclination relative to the center axis of the hollow cylindrical hermetically sealed space, flows of fuel are produced across a wide area in the hermetically sealed space so that large-sized air bubbles are prevented from being formed in the hermetically sealed space. The injection device adds to the liquid an oscillation energy based on a change of volume of the chamber caused by the piezoelectric/electrostrictive element, for atomizing the liquid to be injected.