  Solar Atmospheric Neutrinos (SA$\nu$s) are produced by the interaction of
cosmic rays with the solar medium. The detection of SA$\nu$s would provide
useful information on the composition of primary cosmic rays as well as the
solar density. These neutrinos represent an irreducible source of background
for indirect searches for dark matter towards the Sun and the measurement of
their flux would allow for a better assessment of the uncertainties related to
these searches. In this paper we report on the analysis performed, based on an
unbinned likelihood maximisation, to search for SA$\nu$s with the ANTARES
neutrino telescope. After analysing the data collected over 11 years, no
evidence for a solar atmospheric neutrino signal has been found. An upper limit
at 90\% confidence level on the flux of solar atmospheric neutrinos has been
obtained, equal to 7$\times$$10^{-11}$ [TeV$^{-1}$cm$^{-2}$s$^{-1}$] at E$_\nu
=$ 1 TeV for the reference cosmic ray model assumed.
