  We present the results of a study of the star HD 34736. The
spectropolarimetric observations carried out at the 6-m telescope showed the
presence of a strong variable longitudinal magnetic field, exceeding -4500 G.
The analysis of the HIPPARCOS photometry gives a set of possible periods of the
brightness variability of the star, of which 0.3603 days is preferred. The
variable radial velocity of spectral lines of the star and some signatures of
lines of at least one other component show that HD 34736 is a double
short-period system. Modeling of the spectra allowed us to estimate the
effective temperature $T_{eff}$ of the stars (13 700 and 11 500 K) and their
projected rotational velocities $v\sin i$ (73 and $\geq90$ km s$^{-1}$). The
analysis of all the available information about the star allows us to
hypothesize that the object of study is a close, possibly interacting binary
system.
