A neck jet pillow for a spa or whirlpool tub removably mountable. The pillow has a soft membrane area occupying a central portion thereof, a first mounting member fixedly mountable onto a fluid jet, a second mounting member fixedly attached to the pillow and slidably and removably mountable onto the first mounting member, and a hole in the second mounting member coinciding with the membrane area whereby the jet can direct a fluid stream onto the backside of the membrane area. The first and second mounting members, when mounted together and onto the pillow and jet, define a water-tight cavity there between having a jet inlet and a discharge opening whereby spent fluid from the jet is discharged downward into the tub or spa. The mounting members may be sliding members.
