The 51 year old is leaving after two years, following what the club call a 'disappointing start to 2018'.
Huddersfield Giants have parted company with Head Coach Rick Stone.
The 51 year old joined the club back in 2016 from Newcastle, and brought the Giants back into the top 8 in 2017.
But the board have decided a change is now needed, after what they call a 'disappointing start to 2018', which has seen them win just two out of seven league games this season.
Following Stone's departure, Chris Thorman is in charge of all first team matters with immediate effect.
Giants Managing Director Richard Thewlis said: “It is a very difficult call for any Club to make in respect of the Head Coach but the board felt that a change was needed and that the change should be made sooner rather than later with much of the season still to run. Rick Stone is an outstanding man, character and coach but the results for us simply haven’t worked out as anyone would have wished for.
"Everyone here will be upset to see Rick leave as he is a very popular man but with this decision now made we focus on supporting Chris Thorman in the role with the recognition that we will be inundated with offers of names wanting to come in – all of which we will evaluate in the fullness of time. Chris understands this but he also understands that this is an opportunity for him to put himself forward too as he knows he is very highly thought of in our Club.”