突击砲（德语：Sturmgeschütz）是一种活跃于第二次世界大战的装甲战斗车辆，由德军等首先发展出来，后来他国（主要是苏联）受到影响而发展出其他型号。

大部份突击砲外观和战车相似但没有砲塔，车身相对低矮且射角受限。不同于集中进行机动打击的坦克部队，和主要作反战车任务的驱逐战车，突击砲是一种直射火力，主要用于支持步兵扫荡和摧毁敌人的坚强阵地。

突击砲在德军中受砲兵指挥。德军突击砲最初是搭载短砲身的加农砲，但在德军战车数量不足时开始搭载长砲管的反战车砲，肩负反战车的任务。生产突击砲比生产坦克便宜，因此德国大量生产突击砲以填补坦克产量不足。德军在战争中生产的突击砲主要是三号突击砲，共约有10,000多辆。德军突击砲原本应该装备反坦克大队，但二战后期各装甲团也装备大量突击砲，作为填补坦克数目不足的权宜之计。

Sturmgeschütz (or StuG) meaning "assault gun" was a series of armored vehicles used by both the German Wehrmacht and the Waffen-SS armored formations during the Second World War that primarily consisted of the StuG III and StuG IV. The most common of the two, the StuG III, was built on the chassis of the proven Panzer III. The StuG III was initially designated "StuG" but with the creation of the StuG IV it was re-designated the "StuG III" to distinguish the two. Initially they were intended as a mobile, armored gun platform, providing close fire support to the infantry to destroy bunkers, pillboxes and other entrenched positions. As the war progressed a number of aspects of the StuG series made them a valued supplement to the panzer forces.