Sascha Gerstner (born 2 April 1977) is a German musician who has been one of the guitarists and backing vocalists of power metal band Helloween since 2002.

As of 2016, he is Helloween's second-longest tenured guitarist, surpassing his predecessor Roland Grapow, who stayed in the band for 12 years.

In 1998, he joined the metal band Freedom Call, contributing to their first two albums and touring extensively.

Since then, Gerstner has been a guitarist and songwriter for Helloween, recording seven studio albums and earning commercial success.

He's also involved in Berlin's fashion and photography scenes, leaving his mark with a distinct artistic vision.