Laser-induced fluorescence (LIF) excitation spectra of the SiH 2 A (1,0,0) - and A (1,1,0)-X (0,0,0) bands, and dispersed fluorescence (DF) spectra from the A (1,0,0) and (1,1,0) levels were measured in the supersonic-free jet. From the rotational structures of the excitation spectra, the rotational constants in A (1,v 2 ,0), v 2 =0~2, were determined. The fluorescence decay profiles of the single ro-vibronic levels were also measured, and the fluorescence lifetimes were determined. Based on the lifetimes, it was found that the predissociation depending on the vibronic level starts between the A (1,4,0) and (1,5,0) levels, and the predissociation depending on the rotational level in the A state is suppressed by the ν 1 mode excitation and is promoted by the ν 2 mode. The latter one is qualitatively explained by considering a second-order predissociation mechanism and a rotation-vibration constant, α i A .