Liquid ejection apparatus

A liquid ejection apparatus, comprising:

• a plurality of first piezoelectric elements disposed on an element-disposed surface of a flow-passage defining member so as to be arranged in a first direction;
• a protective cover disposed on the element-disposed surface so as to cover the first piezoelectric elements and including a top wall portion opposed to the first piezoelectric elements and two side wall portions connected respectively to opposite end portions of the top wall portion in a second direction parallel to the element-disposed surface and orthogonal to the first direction;
• a plurality of first wires drawn respectively from first piezoelectric elements to an outside of the protective cover in the second direction and extending on an outer surface of the top wall portion of the protective cover via an outer surface of a corresponding one of the side wall portions;
• a plurality of first terminals disposed on the outer surface of the top wall portion and connected respectively to the first wires;
• and
• a driver electrically connected to the first terminals,
• wherein a distance in the first direction between any adjacent two of the first wires on an outer surface of the protective cover is larger than that on the element-disposed surface.