Abstract. We consider the following anisotropic sinh-Poisson equationwhere Ω ⊂ R 2 is a bounded smooth domain and a(x) is a positive smooth function. We investigate the effect of anisotropic coefficient a(x) on the existence of bubbling solutions. We show that there exists a family of solutions uε concentrating positively and negatively atx, a given local critical point of a(x), for ε sufficiently small, for which with the propertywhere bj = ±1. This result shows a striking difference with the isotropic case (a(x) ≡