This paper presents a SANS study of hydrophobically end-modified poly(2-methyl-2-oxazoline) (POXZ-C-n) micelles in aqueous solutions. Strong long-range repulsive interactions between the micelles are evidenced by correlation peaks present at concentrations as low as 0.5 wt %. Due to the dissymmetry in size between the hydrophobic and hydrophilic parts of the chains, the micelles have been analyzed using a model of starlike micelles. Large extension of the POXZ arms into the micelles can explain the original SANS behavior. The dissociation of the micellar structures by adding a complexing agent of the alkyl groups, hydroxypropy-beta-cyclodextrin (HP beta-CD), has been followed by SANS. The micelles are progressively disrupted by the addition of increasing amounts of HP beta-CD, and the SANS behavior of free chains is recovered in the presence of ail excess of the complexing agent.