  We study photoproduction reactions for Theta^+, which was recently observed
as a candidate of an exotic five quark state uudd(bar s). We employ effective
lagrangian interactions in the linear and non-linear formalism of chiral
symmetry and investigate two cases of spin and parity of Theta^+, J^P = 1/2^+
and 1/2^-. We calculate cross sections and discuss possibilities to
discriminate one from the other.
