  Near-infrared (2.5-5.0$\,\mu$m) low-resolution
($\lambda/\Delta\lambda{\sim}100$) spectra of 72 Galactic planetary nebulae
(PNe) were obtained with the Infrared Camera (IRC) in the post-helium phase.
The IRC, equipped with a $1'{\times}1'$ window for spectroscopy of a point
source, was capable of obtaining near-infrared spectra in a slit-less mode
without any flux loss due to a slit. The spectra show emission features
including hydrogen recombination lines and the 3.3-3.5$\,\mu$m hydrocarbon
features. The intensity and equivalent width of the emission features were
measured by spectral fitting. We made a catalog providing unique information on
the investigation of the near-infrared emission of PNe. In this paper, details
of the observations and characteristics of the catalog are described.
