A syringe assembly includes a first syringe having a first syringe outer cylinder filled with a first liquid, and a first gasket； a second syringe having a second syringe outer cylinder filled with a second liquid, and a second gasket； and a pusher assembly which performs a pushing operation of collectively moving the first and second gaskets. The pusher assembly includes a first pusher having a distal portion connected to the first gasket； a second pusher branching from the first pusher, extending distally, having a distal portion connected to the second gasket； and an operation section which is provided on a proximal-side extension line of the first pusher and is operated for the pushing operation.
