Bruce M. Cheek, 51, an economist with the International Bank for Reconstruction and Deverlopment (World Bank) for more than 20 years, died Monday of a heart attack at his home in Annandale.

Since 1975, Mr. Cheek had been the alternate excutive director for World Bank projects in Australia, New Zealand, Western Samoa and Papula, New Guinea.

A native of Adelaide, Australia, Mr. Cheek was deputy director of the World Bank's West Africa department for 1969 to 1972. He served as the bank's deputy secretary of the consulative group for international agricultural research from 1973 to 1975.

Just before his death, Mr. Cheek had been assigned to work on a development project for the bank's central project staff.

Before joining the World Bank, Mr. Cheek was a research fellow in economics at Australian National University at Canberra. He taught economics at the University of Adelaide in Australia before that.

He received both bachelor's in economics and master's degrees from the University of Adelaide and a second master's degree in economics and government from Harvard University.

Mr. Cheek was a former vestryman of St. Alban's Episcopal Church in Annandale and a Sunday school superintendent there.

His wife, Alison, was one of the first women to be ordained an Episcopla priest in this country. She was ordained in Philadelphia in 1975 with 10 other women and was formally recognized by Virginia Bishop Robert Hall in February of this year.

Besides his wife, of the home, Mr. Cheek is survived by four children, Malcolm of Anchorage. Alaska, Jonathan, of the home and Timothy and Bronwen, both students at Australian National University, and two grandchildren, Malcolm and Benjamin, both of Anchorage.