Ospreys' Dan Biggar makes his first start of the tournament at fly-half.
Wales have made six changes to their starting line-up for the RBS 6 Nations clash against Scotland at the Millennium Stadium on Saturday (KO 2.45pm).
Saturday is an opportunity for us to put in a performance we know we can and finish the Six Nations on a high
Three come in the backline with Liam Williams (Scarlets) and Mike Phillips (Racing Metro) in for injured duo Leigh Halfpenny and Rhys Webb, at full-back and scrum-half respectively.
Dan Biggar makes his first start of the tournament at fly-half, partnering Phillips at half-back.
The rest of the backs remain unchanged from Sunday's game at Twickenham with Jamie Roberts (Racing Metro) and Jonathan Davies (Scarlets) named in the centre and Alex Cuthbert (Cardiff Blues) and George North (Northampton Saints) on the wings.
In the pack Gethin Jenkins (Cardiff Blues) will become Wales' most-capped player when he makes his 105th appearance on Saturday, moving one ahead of Stephen Jones.
Jenkins will feature in a new look front-row alongside Scarlets pair Ken Owens and Rhodri Jones who get their first starts of the campaign.
In the second-row Luke Charteris (Perpignan) returns from injury to take his place alongside Alun Wyn Jones (Ospreys).
The back-row remains unchanged with captain Sam Warburton (Cardiff Blues) playing alongside Dan Lydiate (Racing Metro) and Taulupe Faletau (Newport Gwent Dragons).
Wales will be intent on finishing the competition on a high against a Scotland team who are looking for their first victory in Cardiff since 2002.
"Saturday is an opportunity for us to put in a performance we know we can and finish the Six Nations on a high," said Gatland.
"We've made a number of changes and freshened things up with a just a six day turnaround between matches.
"Liam (Williams) and Mike (Phillips) come in with Leigh (Halfpenny) and Rhys (Webb) ruled out and Dan Biggar gets his opportunity at fly-half.
"In the front-row Ken Owens and Rhodri Jones get their chance to start after impressing off the bench and it's good to have Luke (Charteris) back from injury in the second-row.
"Scotland will come looking to play some rugby and had a morale boosting win against Italy and were unlucky to lose against France in recent weeks.
"We will be looking for a more accurate execution this week to finish with a win at home in Cardiff."
Ospreys duo Richard Hibbard and Adam Jones drop to the bench and are named alongside Paul James (Bath Rugby), Jake Ball (Scarlets) and Justin Tipuric (Ospreys) as the forward replacements. Scarlets half-backs Rhodri Williams and Rhys Priestland are joined by Perpignan's James Hook as backs cover.
WALES SQUAD TO PLAY SCOTLAND:
Liam Williams (Scarlets), Alex Cuthbert (Cardiff Blues), Jonathan Davies (Scarlets), Jamie Roberts (Racing Metro), George North (Northampton Saints), Dan Biggar (Ospreys), Mike Phillips (Racing Metro), Gethin Jenkins (Cardiff Blues), Ken Owens (Scarlets), Rhodri Jones (Scarlets), Luke Charteris (Perpignan), Alun Wyn Jones (Ospreys), Dan Lydiate (Racing Metro), Sam Warburton (CAPT - Cardiff Blues), Taulupe Faletau (Newport Gwent Dragons).
Replacements: Richard Hibbard (Ospreys), Paul James (Bath Rugby), Adam Jones (Ospreys), Jake Ball (Scarlets), Justin Tipuric (Ospreys), Rhodri Williams (Scarlets), Rhys Priestland (Scarlets), James Hook (Perpignan).
Wales and Ospreys back row James King, who came through the North Wales age grade system, nominated North Wales Regional Community Rugby Manager Marc Roberts, in the WRU's 'Diolch' initiative where squad players thanked those who played a part in their rise to the top.
Beating Merthyr has boosted Carmarthen Quins hopes of reaching a top eight spot in the Principality Premiership. Quins captain Haydn Pugh is delighted with his team's progress and is determined that everyone from the Under 6s through to the senior team, enjoys the ride.
When the Wales squad were asked to nominate individuals who played a big part in their early playing days, Wales and Dragons full back and wing Hallam Amos thought of his former Monmouth School rugby coach John Bevan.
Sam Cross and Luke Treharne have been named as co-captains of the Wales Sevens side as head coach Gareth Williams names his 12-man squad to play in the first leg of the HSBC World Series in Dubai next weekend.
Bedwas head coach Steve Law and players Nicky Griffiths and Alun Rees extol the virtues of the close knit club as they prepare to host third place RGC 1404 - who are one place head of them on the Principality Premiership points table - on Saturday.
Many of the Wales squad have said Diolch (thank you) to someone who played an important part in their early playing days by nominating them to be invited to the Wales v South Africa match. One person, Gowerton Comprehensive geography teacher Mr Dean Mason was nominated by two of his former pupils, Dan Biggar and Sam Davies.
The second WRU disability rugby pilot has been delivered, this time in Caerphilly schools, culminating in a festival at the Caerphilly Centre of Sporting Excellence, Ystrad Mynach tomorrow. Plans are in place to set up a Disability Rugby Club in Newbridge to provide long-term playing opportunities.
WRU TV: Hear from inside the Wales camp as Neil Jenkins discusses this weekend's clash with South Africa and how the squad are looking to put in a strong performance to round of the 2016 Under Armour Series