Hans Martin Knut Henriksson (born 30 October 1974) is a former Swedish musician best known for his work with melodic death metal band Dark Tranquillity and was one of the original members, and the main songwriter for the band until he left them in 2016.

He switched to guitar when their ex-guitarist Fredrik Johansson quit, but recorded bass again once on Construct when the band had no bassist at the time.

His official resignation became effective 31 March 2016 when Dark Tranquillity announced Henriksson's departure from the band.

[3] Some exceptions to that are the songs 'Focus Shift' and 'Lost to Apathy', in whose videos Martin is seen playing slow, smooth leads.

He previously used Rocktron Prophesy rack mounted pre-amps, but after the Damage Done tour, he and Niklas Sundin begun using Peavey 5150 and Mesa/Boogie Dual Rectifier amplifiers along with Behringer V-AMP 2 PRO modeling processors.