[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["必要な情報がない","missingTheInformationINeed","thumb-down"],["複雑すぎる / 手順が多すぎる","tooComplicatedTooManySteps","thumb-down"],["最新ではない","outOfDate","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["サンプル / コードに問題がある","samplesCodeIssue","thumb-down"],["その他","otherDown","thumb-down"]],["最終更新日 2025-07-25 UTC。"],[],[],null,["# REST Resource: users.messages.attachments\n\n- [Resource: MessagePartBody](#MessagePartBody)\n - [JSON representation](#MessagePartBody.SCHEMA_REPRESENTATION)\n- [Methods](#METHODS_SUMMARY)\n\nResource: MessagePartBody\n-------------------------\n\nThe body of a single MIME message part.\n\n| JSON representation |\n|---------------------------------------------------------------------|\n| ``` { \"attachmentId\": string, \"size\": integer, \"data\": string } ``` |\n\n| Fields ||\n|----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `attachmentId` | `string` When present, contains the ID of an external attachment that can be retrieved in a separate `messages.attachments.get` request. When not present, the entire content of the message part body is contained in the data field. |\n| `size` | `integer` Number of bytes for the message part data (encoding notwithstanding). |\n| `data` | `string (`[bytes](https://developers.google.com/discovery/v1/type-format)` format)` The body data of a MIME message part as a base64url encoded string. May be empty for MIME container types that have no message body or when the body data is sent as a separate attachment. An attachment ID is present if the body data is contained in a separate attachment. A base64-encoded string. |\n\n| Methods ------- ||\n|----------------------------------------------------------------------------------|----------------------------------------|\n| ### [get](/workspace/gmail/api/reference/rest/v1/users.messages.attachments/get) | Gets the specified message attachment. |"]]