  We present the analysis of the binary-microlensing event OGLE-2014-BLG-0289.
The event light curve exhibits very unusual five peaks where four peaks were
produced by caustic crossings and the other peak was produced by a cusp
approach. It is found that the quintuple-peak features of the light curve
provide tight constraints on the source trajectory, enabling us to precisely
and accurately measure the microlensing parallax $\pi_{\rm E}$. Furthermore,
the three resolved caustics allow us to measure the angular Einstein radius
$\thetae$. From the combination of $\pi_{\rm E}$ and $\thetae$, the physical
lens parameters are uniquely determined. It is found that the lens is a binary
composed of two M dwarfs with masses $M_1 = 0.52 \pm 0.04\ M_\odot$ and
$M_2=0.42 \pm 0.03\ M_\odot$ separated in projection by $a_\perp = 6.4 \pm 0.5$
au. The lens is located in the disk with a distance of $D_{\rm L} = 3.3 \pm
0.3$~kpc. It turns out that the reason for the absence of a lensing signal in
the {\it Spitzer} data is that the time of observation corresponds to the flat
region of the light curve.

Solar and Stellar Astrophysics