[en] Discussions are made on the neoclassical transport in an l = 2 high-shear helical system which is similar to the Heliotron-E device with a large helical ripple, epsilon sub(h)(anti a) -- 0.3, compared to the toroidal ripple, epsilon sub(t)(anti a) -- 0.1. It has an average minor radius of anti a = 20 cm, an aspect ratio of R/anti a = 10 and a helical magnetic field of about 20 KG. It is well known that the l = 2 helical system has elliptic magnetic surfaces. The effect of ellipticity on neoclassical transport has not yet been studied. The author's concern is in the neoclassical diffusion for both the 1/ν regime and the plateau regime, where ν is the electron-ion collision frequency. The results in the 1/ν regime that have been published in NUCLEAR FUSION (vol 23, 1983) are summarized in the section 2 of this paper. The ellipticmagnetic surfaces with ellipticity larger than 1 improve transport in tokamaks. The effect of ellipticity on the plateau diffusion in an l = 2 helical system is discussed in the section 3. (Aoki, K.)