An object is to provide a solenoid valve device that can quickly move an armature and can more reliably inhibit penetration of contaminants.
A solenoid valve unit (3) is provided with a breathing hole (6h) extending in a radial direction through a sleeve (6) on a side of a solenoid portion (10) and bringing a space (A), which is formed between an armature (34) and a spool (7) when the armature (34) is at least in a predetermined region, into communication with the outside, a first opening (11d) facing a side of a valve portion (5) and opening to the outside, a second opening (11h) opening to the outside, and a breathing channel in a solenoid case (11), the breathing channel communicating at an end thereof with the first opening (11d) and communicating at an opposite end thereof with the second opening (11h). The solenoid valve unit (3) and the valve housing (2) are fixed together with an annular seal (40,11k) being interposed around the sleeve (6) so that a passage between the breathing hole (6h) of the solenoid valve unit (3) and the first opening (11d) is ensured and a passage between the breathing hole (6h) and the outside is cut off.