To obtain a sash sliding door capable of properly discharging moisture trying to intrude for accumulation from between glass and a seal, while using a glazing channel, advantageous in terms of total costs, as much as possible.

This sash 11 comprises double glazing 21, and a sash frame 31 which is mounted at the peripheral edge of the double glazing 21. Both the glazing channel 41 and a one-side bead 51 are used as a sealing material for sealing a section between the double glazing 21 and the sash frame 31. More specifically, the glazing channel 41 is arranged in such a manner as to correspond to a top rail 32 of the sash frame 31 and both right and left stiles 33 and 34 thereof, and arranged in such a manner as to hang over both right and left end portions of the bottom rail 35. The one-side bead 51 is arranged over the horizontal most part of the bottom rail 35 where the glazing channel 41 is not arranged.