Rule · Federal Rules of Evidence

Rule 705. Disclosing the Facts or Data Underlying anExpert's Opinion

Federal Rules of Evidence § 705

Type: Rule
Source: Federal Rules of Evidence
Jurisdiction: Federal
Date: 2026-07-10
Topic: general

Rule 705. Disclosing the Facts or Data Underlying anExpert's Opinion Unless the court orders otherwise, an expert may state an opinion — and give the reasons for it — without first testifying to the underlying facts or data. But the expert may be required to disclose those facts or data on cross-examination. (As amended Mar. 2, 1987, eff. Oct. 1, 1987; Apr. 22, 1993, eff.

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Rule705. Disclosing the Facts or Data Underlying anExpert's Opinion

Unless the court orders otherwise, an expert may state an opinion — and give the reasons for it — without first testifying to the underlying facts or data. But the expert may be required to disclose those facts or data on cross-examination.

(As amended Mar. 2, 1987, eff. Oct. 1, 1987; Apr. 22, 1993, eff. Dec. 1, 1993; amended eff. Dec. 1, 2011.)