Dental photocurable composition excellent in storage stability

A dental curable composition, comprising (A) polymerizable monomer, (BC) polymerization initiator, (D) polymerization accelerator and (E) filler, wherein,

• the (BC) polymerization initiator comprises (B) photopolymerization initiator and optionally (C) chemical polymerization initiator,
• the (B) photopolymerization initiator comprises (B1) photosensitizer and (B2) photoacid generator,
• the (B2) photoacid generator comprises an aryl iodonium salt,
• the aryl iodonium salt is a salt of an anion having an organic group and one or more atoms selected from the group consisting of P, B, Al, S and Ga, and an aryl iodonium cation,
• the (C) chemical polymerization initiator comprises (C1) organic peroxide,
• the (E) filler comprises (E1) surface-treated basic filler,
• the (E1) surface-treated basic filler is treated with (F1) surface treatment agent represented by the formula (1) and/or condensate thereof:
• wherein, M is a metal atom selected from Si, Ti, Zr, and Al, X is H, OH or a hydrolyzable group, and may be the same or different from each other, In the case that M is Si, Ti or Zr, n is 4, In the case that M is Al, n is 3, and
• a composition range of the (E1) surface-treated basic filler satisfies SiO2:
• 15 to 35% by mass, Al2O3:
• 15 to 30% by mass, SrO:
• 20 to 45% by mass, P2O5:
• 0 to 15% by mass, F:
• 5 to 15% by mass, Na2O:
• 0 to 10% by mass, B2O3:
• 0 to 20% by mass and CaO:
• 0 to 10% by mass.