To obtain an improved fluidity of a base material (I) and a curing agent (II), even when the content of microballoons is significantly increased for better machinability of a model material and enable suction and transport of the liquids from the base material vessel or the curing agent vessel and a mixed ejection at a two-liquid dispenser.

The modeling paste includes a reaction-curable resin-forming component (A) and microballoons (B) comprising two balloons (B1) and (B2) having different volume average particle sizes. The content of (B) to the total volume of (A) and (B) is 20-80% and the particle size ratio of the volume average particle size (d1) of (B1) to the volume average particle size (d2) of (B2) is 2/1-4/1.