  Two new bands built on the two-quasiparticle $\pi(h_{11/2})^2$ configuration
of the even-even nucleus $^{130}$Ba are investigated using constrained triaxial
covariant density functional theory combined with quantum particle rotor model
calculations. The energy difference between the two bands, as well as the
available electromagnetic transition probabilities
$B(M1)_{\textrm{out}}/B(E2)_{\textrm{in}}$ and
$B(E2)_{\textrm{out}}/B(E2)_{\rm{in}}$, are well reproduced. The analysis of
the angular momentum geometry reveals that the higher band represents
transverse wobbling motion of a two-quasiparticle configuration. This is the
first example of two-quasiparticle wobbling bands in an even-even nucleus.
