Chapter 40: Oklahoma Evidence Code · Last amended November 1, 1986 · Last verified August 3, 2026
In one sentenceSets the error-preservation rule for evidentiary rulings, requiring a specific objection to admitted evidence or an offer of proof for excluded evidence before an appellate court will review the ruling, subject to a plain-error exception.
A.Error may not be predicated upon a ruling which admits or excludes evidence unless a substantial right of a party is affected, and:
1.If the ruling is one admitting evidence, a timely objection or motion to strike appears of record, stating the specific ground of objection, if the specific ground was not apparent from the context; or
2.If the ruling is one excluding evidence, the substance of the evidence was made known to the judge by offer or was apparent from the context within which questions were asked.
B.The court may add any statement which shows the character of the evidence, the form in which it was offered, the objection made and the ruling thereon. It may direct the making of an offer in question and answer form.
C.In jury cases, proceedings shall be conducted, to the extent practicable, so as to prevent inadmissible evidence from being presented to the jury by any means, including making statements or offers of proof or asking questions within the hearing of the jury.
D.Nothing in this section precludes taking notice of plain errors affecting substantial rights although they were not brought to the attention of the court.
Amendment History
Laws 1978, SB 276, c. 285, § 104, eff. 10/1/1978; Amended by Laws 1986, HB 1948, c. 240, § 1,
eff. 11/1/1986.
Plain-English Summary
An appellate court won't reverse a case over an evidentiary ruling unless the ruling affected a substantial right and the record shows the right kind of preservation. If the judge admitted evidence, the objecting party needed a timely objection or motion to strike that stated the specific ground -- unless that ground was already apparent from context. If the judge excluded evidence, the substance of what was excluded needs to be in the record, either through an offer of proof or because it was apparent from the questions asked.
The section also gives trial judges tools to manage the process: adding a statement describing the evidence and the ruling, directing an offer in question-and-answer form, and, in jury trials, keeping inadmissible evidence away from the jury's hearing as much as practicable. None of this closes the door on plain-error review -- subsection D preserves a court's power to notice plain errors affecting substantial rights even without an objection.
Frequently Asked Questions
Do I have to object at trial to appeal an evidence ruling?
Generally, yes. Section 2104(A) says error can't be predicated on an evidentiary ruling unless a substantial right was affected and there was a timely objection or motion to strike stating the specific ground, or, for excluded evidence, an offer showing its substance.
What if I didn't object but the error was serious?
Subsection D preserves the court's power to notice plain errors affecting substantial rights even though they weren't brought to the court's attention.
How do you get excluded evidence into the appellate record?
By an offer of proof, or by making the substance of the evidence apparent from the context of the questions asked -- subsection A(2) requires one or the other.
Can a judge require an offer of proof in question-and-answer form?
Yes. Subsection B lets the court direct that an offer be made in question and answer form.
Source & verification. Section text is reproduced verbatim from
Title 12 of the Oklahoma Statutes, enacted by the Oklahoma Legislature.
Last verified August 3, 2026.
· Official source
Also known as:oklahoma evidence code FRE 10312 O.S. § 2104 rulings on evidenceobjection preserve error oklahoma evidenceplain error oklahoma evidence rule