Arhopala sophrosyne is a butterfly in the family Lycaenidae.

It is found in the Australasian realm (New Ireland, Guadalcanal, and Bougainville).

It has, in the male forewing, which is above of a lustrous sky-blue, the costal area darkened by ultra-marine, whilst in the female the costal parts of all the wings are black.

Easily discernible by the under surface where we notice in the chestnut-brown proximal parts of the wings small ring-spots distinctly surrounded by white.

[2] [3] Named in the Classical tradition for Sophrosyne.