PROBLEM TO BE SOLVED: To provide a dental polymerizable composition that has excellent removability and temporary-attachment holding power.SOLUTION: A dental polymerizable composition comprises a (meth)acrylic polymerizable monomer (a), an organic silicon compound (b) represented by the following formula [I], a softener (c) and a polymerization initiator (d) (where Ris a hydrogen atom or a methyl group, Ris a hydrolyzable group, Ris a C1-C6 hydrocarbon group, X is oxygen or a sulfur atom, p is 2 or 3, and q is an integer of 3-18).SELECTED DRAWING: None