In this study we investigated the morphology transition of microemulsion droplet induced by polymer confinement using a small angle neutron scattering (SANS) technique. By confining the polymer chain strongly the scattering profiles showed the following changes; 1) a characteristic scattering peak corresponding to the size of droplet shifts to the higherqside, and 2) the scattering intensity in the lowqregion increases considerably. These changes of the scattering profiles can be described by a rod (or sphero‐cylinder) model. Thus, the strong confinement of polymer chains in droplets induces the morphological transition from spherical to rod‐like droplet. © 2004 American Institute of Physics