Observations and modeling of B[e] stars

We give a short definition of B[e] star and we show spectrocopic variabilit ies obtained for the peculiar star HD 45677 especialy for the strong He I l ine at 5876 Angstrom. We present also some photometric observations for thi s type of stars that show a important excess in the near and mid infrared d ue to the presence of circumstellar dust. The modeling of these stars shows that a simple model with a spherical dust shell fits well the observations . High spatial resolution gives an additional constraint on the modeling.