The infrared spectrum of SiH₂ was observed in the 5 μm region by using diode laser spectroscopy, and three bands ν₁, 2ν₂, and ν₃ were recorded and assigned. A separate analysis of the three bands yielded the band origines, 1995.9280, 1987.6938, 1992.816 cm^-1, respectively, thereby establishing that ν₁ is higher than 2ν₂, contrary to the result of a previous matrix study. The anharmonic resonance, both ν₁/2ν₂ Fermi and 2ν₁/2ν₃ Darling-Dennison, which were observed in the laser induced fluorescence spectra previously erported, were reanalyzed by removing the condition ν₁ < 2ν₂, leading to much improved set of vibrational parameters. The harmonic frequencies of SiH₂ were then obtained to be ω₁=2076.55, ω₂=1020.49, and ω₃=2065.65 cm^-1. Molecular constants of SiH₂ in the ground vibronic state were reexamined in light of the present as well as other spectroscopic results recently obtained on the molecule.