  We report the discovery of TOI-530b, a transiting giant planet around an
M0.5V dwarf, delivered by the Transiting Exoplanet Survey Satellite (TESS). The
host star is located at a distance of $147.7\pm0.6$ pc with a radius of
$R_{\ast}=0.54\pm0.03\ R_{\odot}$ and a mass of $M_{\ast}=0.53\pm0.02\
M_{\odot}$. We verify the planetary nature of the transit signals by combining
ground-based multi-wavelength photometry, high resolution spectroscopy from
SPIRou as well as high-angular-resolution imaging. With $V=15.4$ mag, TOI-530b
is orbiting one of the faintest stars accessible by ground-based spectroscopy.
Our model reveals that TOI-530b has a radius of $0.83\pm0.05\ R_{J}$ and a mass
of $0.4\pm0.1\ M_{J}$ on a 6.39-d orbit. TOI-530b is the sixth transiting giant
planet hosted by an M-type star, which is predicted to be infrequent according
to core accretion theory, making it a valuable object to further study the
formation and migration history of similar planets. We discuss the potential
formation channel of such systems.
