Quick answerNo, a Joker cannot complete a pair or a single tile. Jokers only work in groups of three or more identical tiles: pungs, kongs, quints and sextets. You also cannot pass a Joker in the Charleston.
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A standard American Mahjong set has eight Jokers, and the annual card leans on them heavily. Some hands need five or six of a kind, and there are only four of any numbered tile, Wind or Dragon in the set. Jokers make those hands possible. They are also the tile most likely to get a beginner's hand declared dead, because the rules around them are strict and easy to forget in the moment.
Where Jokers work
A Joker can replace any tile inside a group of three or more identical tiles:
- Pung (three identical tiles), for example two 4 Dots plus a Joker.
- Kong (four identical tiles), for example three North Winds plus a Joker.
- Quint (five identical tiles). Because a set has only four of each tile, a quint needs at least one Joker. Flowers are the exception: a set has eight, so a Flower quint can be all natural tiles.
- Sextet (six identical tiles), which needs at least two Jokers, again except for Flowers.
A group can even be made entirely of Jokers. Three Jokers exposed and announced as a pung of Red Dragons is legal.
| Group | Tiles | Can a Joker be used? |
|---|---|---|
| Single | 1 | No |
| Pair | 2 | No |
| Pung | 3 | Yes |
| Kong | 4 | Yes |
| Quint | 5 | Yes (at least one required, except Flowers) |
| Sextet | 6 | Yes (at least two required, except Flowers) |
Where Jokers never work
- Pairs. A pair must be two natural tiles, even if that pair is the last thing you need to call Mahjong. This is the rule beginners break most often.
- Singles. Some hands on the card use single tiles, such as the individual digits in a "year" hand or a lone Wind or Dragon. A Joker cannot stand in for any of them.
- The Charleston. You can never pass a Joker during the Charleston. If you are dealt one, it stays in your rack. (More on this in our Charleston guide.)
Rules warningIf you expose a pair using a Joker, or use a Joker for a single tile, your hand is dead the moment another player notices. Read what a dead hand means before your first game.
How to exchange a Joker
When any player, including you, has an exposed group on top of their rack that contains a Joker, you can take that Joker by swapping in the natural tile it is standing for. Players call this a Joker exchange or redemption. It is one of the best moves in the game, because it hands you a wildcard and costs you a tile you were probably not using.
- Wait for your turn.
Exchanges only happen on your own turn, never in reaction to someone else's play.
- Start the turn normally.
Either draw a tile from the wall or call a discard for an exposure. You must do one of those before exchanging.
- Make the swap.
Hand over the exact natural tile the Joker represents. If the exposed group is a kong of 5 Bams with one Joker, you give a natural 5 Bam.
- Take the Joker.
Put it straight into your rack. It is now yours to use in any group of three or more.
- Discard to end your turn.
Finish the turn as usual by discarding one tile.
Beginner tipYou can exchange more than one Joker in a single turn if you hold the natural tiles, and you can exchange from anyone's exposures, including your own. Scan every rack for Jokers each time it is your turn.
Discarding a Joker
Sometimes a Joker stops being useful. If the only thing left in your hand to complete is a pair, a Joker cannot help, and you are allowed to discard it. A discarded Joker is completely dead: nobody can call it for an exposure and nobody can claim it for Mahjong. It simply goes to the table and stays there.
Edge cases worth knowing
Jokers on a dead hand
If a player's hand is declared dead, you can usually still exchange Jokers from exposures they made before the mistake. But if the Joker sits in the very exposure that killed the hand, that exposure comes off the rack and the Joker is out of reach. If the hand died because the player exposed tiles for a concealed hand, all of their exposures go back into the rack and none of those Jokers can be exchanged.
The missed exchange
Say you hold a natural 7 Crak, another player has a 7 Crak exposure with a Joker in it, and you discard the 7 Crak without exchanging. Once the tile is on the table and your hand has left it, the chance is gone. Someone else may still call your 7 Crak for an exposure, but the Joker stays where it is.
Common Joker questions
Can you use a Joker in a pair?
No. Pairs must be two natural tiles, without exception, including the final pair you need for Mahjong.
Can you pass a Joker in the Charleston?
No. Jokers are never passed during the Charleston or the optional courtesy pass. Keep it in your rack.
Can you discard a Joker?
Yes. It is legal, and it is sometimes the right move late in a hand. Once discarded, a Joker is dead and cannot be called by anyone.
Can you exchange more than one Joker in a turn?
Yes, as long as you hold the matching natural tile for each one and it is your turn.
Can you exchange a Joker from your own exposure?
Yes. Redeeming from your own rack is allowed and is often overlooked.
How many Jokers are in an American Mahjong set?
Eight. That is what brings an American set to 152 tiles instead of the 144 in a traditional Chinese set. Many sets also include blank spare tiles.
Official rules note. This guide explains American Mahjong as it is commonly played with the National Mah Jongg League card. House rules and tournament procedures can vary. For the official wording, use the current card and rulebook from the National Mah Jongg League. MahjongKit is not affiliated with the League.