Abstract
In speech act theory, there are two typical views about illocutionary acts. According to the conventionalism, they are essentially governed by conventions or the like. According to the dichotomous view, some of them (such as naming a ship) are so but the others (such as asserting) should be analyzed along the line of Griceʼs analysis of nonnatural meaning. However, it seems that both of the views have problems. I will attempt to analyze illocutionary acts on the basis of the two concepts of “socially regarded" and “ostensible attitudes". It appears that various difficulties with existing views can be resolved by such an analysis.
