  We measured the transport properties and susceptibility of single crystals
Ca$_{1-x}$La$_x$Fe$_2$As$_2$(x=0, 0.05, 0.1, 0.15, 0.19 and 0.25). Large
in-plane resistivity anisotropy similar to that in Co-doped 122 iron-pnictides
is observed although no transition metals were introduced in the FeAs-plane.
The in-plane resistivity anisotropy gradually increases with La doping below
T$_{SDW}$, being different from the hole-doped 122 superconductors. The
susceptibilities of the samples show that La doping leads to suppression of SDW
and induces a Curie-Weiss-like behavior at low temperature, which is much
stronger than the other 122 iron-based superconductors.
