To save trouble in affixing a label to better operability in a direct- coupled faucet type water purifier that a water purifier body is freely attachably and detachably assembled in a faucet connecting body equipped with a flow passage switching valve by printing a date fill-in part on the surface of a housing of the purifier body.

In the faucet direct-coupled type water purifier, when a water flow switching lever 4 is rotated to switch a flow passage switching valve to water purification side, raw water from a faucet 9 is turned into clean water through a raw water inlet 8, a faucet connecting body 2, and a water purifier body 6 and the clean water is discharged from a clean water discharging hole 7. In this case, on the surface of a housing of the water purifier body 6, [Year- Month-Day] as a date fill-in part 1 having a blank space to fill in numbers for a date together with letters of a [replacement date] is printed at a position easy to see for a user and to the user. The color of these printed letters and numbers is preferably made color in contrast to that of the housing of the water purifier body 6, for example, black in the case of the color of the housing of the water purifier body 6 being white.