Deathsmiles II: Makai no Merry Christmas (デススマイルズII 魔界のメリークリスマス, lit. Netherworld's Merry Christmas) is a horizontal side scrolling shoot 'em up arcade game by Japanese developer Cave, released in 2009. It is the third Cave shoot 'em up to be played using a horizontally-oriented monitor (preceded by Progear and the original Deathsmiles). Deathsmiles II is also the first CAVE arcade game to use polygons instead of their traditional sprites for graphics.

Deathsmiles IIX was ported to the Xbox 360 with additional modes in 2010. It was released both regular and limited editions which included a soundtrack CD.