  We report a mechanical point-contact spectroscopy study on the single
crystalline NbGe$_2$ with a superconducting transition temperature $T\rm_c$ =
2.0 - 2.1 K. The differential conductance curves at 0.3 K can be well fitted by
a single gap s-wave Blonder-Tinkham-Klapwijk model and the temperature
dependent gap follows a standard Bardeen-Cooper-Schrieffer behavior, yielding
$\Delta_0 \sim$ 0.32 meV and 2$\Delta_0$/$k\rm_{B}$$T\rm_{c}$ = 3.62 in the
weak coupling limit. In magnetic field, the superconducting gap at 0.3 K keeps
constant up to $H_{c1}\sim$150 Oe and gradually decreases until $H_{c2}\sim$350
Oe, indicating NbGe$_2$ going through a transition from type-I to type-II
(possible type-II/1) superconductor at low temperature.
