The present invention provides an oil-in-water type emulsion composition characterized by comprising components (a) to (e) below: (a) an acrylic acid-methacrylic acid alkyl copolymer, (b) a block-type alkylene oxide derivative represented by the following formula (I), R1O-[(AO)l(EO)m(AO)n]-R2 (I) (In the formula: AO is a C3-4 oxyalkylene group EO is an oxyethylene group and l, m and n are each independently an average addition mol number of the oxyalkylene group and oxyethylene group, and are 1=m=70 and 1=l+n=70. The ratio of the oxyethylene group with respect to the total of the C3-4 oxyalkylene group and the oxyethylene group is 20-80 mass%. R1 and R2 are the same or different C1-4 hydrocarbon group or a hydrogen atom.), (c) a nonionic surfactant, (d) oil, and (e) water. The objective of the present invention is to provide, with respect to an oil-in-water type emulsion composition comprising (a) an acrylic acid-methacrylic acid alkyl copolymer as a polymeric emulsifier, an oil-in-water type emulsion composition and a cosmetic material which have excellent stability and usability.
