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 \hbox { $ . ^ { d } $ } 3603 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 _ { \mathrm { eff } } of the stars ( 13 700 and 11 500 K ) and their projected rotational velocities v \sin i ( 73 and \geq 90 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 .

Key words : stars : magnetic field—binaries : close—stars : fundamental parameters—stars : chemically peculiar—stars : individual : HD 34736