In order to identify the number and the types of entries in dictionaries of idiomatic expressions, the purpose of this study was to compare four relevant dictionaries. Those selected were Oxford Dictionary of English Idioms: ODEI (1993); Oxford Dictionary of Phrasal Verbs:ODPV (1993); Longman Dictionary of English Idioms: LDEI (1979); and Longman Dictionary of Phrasal Verbs: LDPV (1983). To complete the study, all the entries of each dictionary were typed into the author’s personal computer and then analyzed. The results revealed the following: (1) The actual number of entries in ODEI (1993), ODPV (1993), and LDPV (1983) are, respectively, smaller than the published number indicated in the dictionaries, while that in LDEI (1979) is greater than the published number. (2) Among the dictionaries, ODPV (1993) is characterized by its employment of “Complex idioms” in the entries, while LDPV (1983) includes “Verb + Adjective” and “Verb + Pronoun” in the entries, and then “Complex idioms” in the sub-entries. (3) The method of dealing with “Complex idioms,” characterizing the entries in ODPV (1993) and the sub-entries in LDPV (1983), affects the format and appearance of the dictionaries.