PROBLEM TO BE SOLVED: To provide a microneedle array and a microneedle array production method capable of easily producing a shape with a high aspect ratio, a shape having a barb, and a complex shape with a mechanism such as a valve.SOLUTION: The microneedle array is formed by sticking a pair of half-split microneedle array elements each having a needle with a flow passage and a drug solution outlet in a half-split manner. The microneedle array production method includes: preparing a pair of half-split microneedle array elements each having a half-split needle with a flow passage and a drug solution outlet in the half split manner and sticking the pair of microneedle array elements together to acquire a microneedle array.