A coin stacker for stacking coins to be wrapped includes a pair of stacking blocks each being movable relative to the other perpendicular to a vertical plane including the center line of a coin sorting passage for passing coins of a predetermined denomination therethrough. The first stacking block includes a first inner wall section lying at an angle X to the direction in which the coin sorting passage extends and a second inner wall section lying at an angle -X to the vertical plane including the center line of the coin sorting passage. The second inner wall section is higher than the first inner wall section in the direction in which the coins are stacked. The second stacking block includes a first inner wall section and a second inner wall section. The first inner wall section thereof and the first inner wall section of the first stacking block are formed symmetrically with respect to the center line of the coin sorting passage, and the second inner wall section thereof and the second inner wall section of the first stacking block are formed symmetrically with respect to the center line of the coin sorting passage. The second inner wall section thereof is higher than the first inner wall section thereof in the direction in which the coins are stacked.
