  A high statistics data sample of the $K^{+}$ decays is recorded by the OKA
collaboration. A missing mass analysis is performed to search for a light
invisible pseudoscalar axion-like particle (ALP) $a$ in the decay $K^{+} \to
\pi^{+} \pi^{0} a$. No signal is observed, the upper limits for the branching
ratio of the decay are calculated. The $90\%$ confidence level upper limit is
changing from $2.5\cdot10^{-6}$ to $2\cdot10^{-7}$ for the ALP mass from 0 to
200 MeV/$c^{2}$, except for the region of $\pi^{0}$ mass, where the upper limit
is $4.4\cdot10^{-6}$.
