The present invention provides a silicon-containing compound shown by the following formula (1): wherein R1, R2, R3, R4, R5, and R6 each independently represent a linear, branched, or cyclic alkyl group having 1 to 6 carbon atoms, a phenyl group, a 3,3,3-trifluoropropyl group, or a group shown by —(OSiR7R8)n—OSiR9R10R11; R7, R8, R9, R10, and R11 have the same meanings as R1 to R6; “n” is an integer in the range of 0 to 100; and “A” represents a linear or branched alkylene group having 1 to 6 carbon atoms. This provides a stretchable film that has excellent stretchability and strength, with the film surface having excellent repellency, and a method for forming the same; as well as a urethane resin used for the stretchable film; and a silicon-containing compound to be a material of the urethane resin.