We present CCD BVI photometry of 85 variable stars from the field of the globular cluster NGC 6934 .
The photometry was obtained with the image subtraction package ISIS .
35 variables are new identifications : 24 RRab stars , 5 RRc stars , 2 eclipsing binaries of W UMa-type , one SX Phe star , and 3 variables of other types .
Both detected contact binaries are foreground stars .
The SX Phe variable belongs most likely to the group of cluster blue stragglers .
Large number of newly found RR Lyr variables in this cluster , as well as in other clusters recently observed by us , indicates that total RR Lyr population identified up to date in nearby galactic globular clusters is significantly ( > 30 \% ) incomplete .

Fourier decomposition of the light curves of RR Lyr variables was used to estimate the basic properties of these stars .
From the analysis of RRc variables we obtain a mean mass of M = 0.63 M _ { \odot } , luminosity \log L / L _ { \odot } = 1.72 , effective temperature T _ { eff } = 7300 and helium abundance Y = 0.27 .
The mean values of the absolute magnitude , metallicity ( on Zinn ’ s scale ) and effective temperature for RRab variables are : M _ { V } = 0.81 , { [ Fe / H ] } = -1.53 and T _ { eff } = 6450 , respectively .
From the B - V color at minimum light of the RRab variables we obtained the color excess to NGC 6934 equal to E ( B - V ) = 0.09 \pm 0.01 .
Different calibrations of absolute magnitudes of RRab and RRc available in literature were used to estimate apparent distance modulus of the cluster : ( m - M ) _ { V } = 16.09 \pm 0.06 .
We note a likely error in the zero point of the HST -based V -band photometry of NGC 6934 recently presented by Piotto et al .
Among analyzed sample of RR Lyr stars we have detected a short period and low amplitude variable which possibly belongs to the group of second overtone pulsators ( RRe subtype variables ) .

The BVI photometry of all variables is available electronically via anonymous ftp .
The complete set of the CCD frames is available upon request .