Let 𝒮N be symmetric group of degree N. In the representation of 𝒮N corresponding to trapeziform partition (precisely τ=(m2k,a,b), 0≤b≤a<m), we propose nonsymmetric Jack polynomials in 2mk+a+b variables which are singular at 1m+2. Moreover those nonsymmetric Jack polynomials span a module of 𝒮N which is isomorphic to the representation of type σ=(mk+a,mk+b).