  The kaon photoproduction is analyzed up to $E_\gamma^{\rm Lab}$=2.0 GeV by
using an isobaric model based on effective Lagrangians and by taking a cross
symmetry into account. Both {\it pseudovector} and {\it pseudoscalar} couplings
for kaon-baryon-baryon (baryon spin=1/2) interactions are considered with form
factors. A vector meson($K^*(890)$), an axial vector meson($K_1(1270)$),
nucleon resonances($J\le5/2$), and hyperon resonances($J\le3/2$) are treated as
participating particles. By determining unknown coupling constants through a
systematic fitting of the differential cross section, the total cross section,
the single polarization observable, and the radiative kaon capture branching
ratio to their experimental data, we find out a simple model which reproduces
all the experimental data well.
